Forecasting Asset Returns in Realistic Environments David E. Rapach - PowerPoint PPT Presentation
Forecasting Asset Returns in Realistic Environments David E. Rapach Saint Louis University CFA Montreal Asset Management Forum October 8, 2015 David E. Rapach Forecasting Asset Returns Introduction Forecasting asset returns is fascinating
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Forecasting challenges & strategies Stating the obvious I We don’t know The Model of asset returns Actual DGP is highly complex & constantly evolving Substantial model uncertainty & instability Hedgehog approach inadvisable Need to incorporate info from many predictors But also need to avoid overfitting Effective strategies from recent literature Forecast combination & diffusion indices Stating the obvious II I’m a fox David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Stylized example: equity risk premium ERP: S&P 500 return minus risk-free return Huge literature on predicting ERP (Rapach & Zhou 2013) Predictive regression forecast: ˆ α t + ˆ R t + 1 = ˆ β t x t Incorporate info from x t to forecast R t + 1 Prevailing mean benchmark forecast: ¯ R t + 1 Assumes no return predictability (RW with drift) Stringent out-of-sample benchmark (Goyal & Welch 2008) Out-of-sample R 2 (Campbell & Thompson 2008) Proportional ↓ in MSFE for PR vis-à-vis PM Sample period: 1926:01–2014:12 Forecast evaluation period: 1960:01–2014:12 David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Highly plausible predictors Dividend yield (Fama & French 1988) T-bill yield (Ang & Bekaert 2007) Term spread (Campbell 1987) Default spread (Fama & French 1989) Inflation (Nelson 1976) Output gap (Cooper & Priestly 2009) Moving-average signal (Neely, Rapach, Tu, & Zhou 2014) Momentum signal (Neely, Rapach, Tu, & Zhou 2014) David E. Rapach Forecasting Asset Returns
Individual monthly PR forecasts Dividend yield T-bill yield 2 2 1 1 0 0 -1 -1 1960 1970 1980 1990 2000 2010 1960 1970 1980 1990 2000 2010 Term spread Default spread 2 2 1 1 0 0 -1 -1 1960 1970 1980 1990 2000 2010 1960 1970 1980 1990 2000 2010 David E. Rapach Forecasting Asset Returns
Individual monthly PR forecasts Inflation Output gap 2 2 1 1 0 0 -1 -1 1960 1970 1980 1990 2000 2010 1960 1970 1980 1990 2000 2010 MA signal Momentum signal 2 2 1 1 0 0 -1 -1 1960 1970 1980 1990 2000 2010 1960 1970 1980 1990 2000 2010 David E. Rapach Forecasting Asset Returns
R 2 OS stats (%) Semi- Predictor Monthly Quarterly annual Annual Dividend yield − 0.03 − 2.27 1 . 11 − 1.87 T-bill yield − 0.10 − 0.47 − 1.86 − 2.59 Term spread 0 . 25 0 . 45 0.40 2 . 24 Default spread 0.30 1 . 11 1 . 29 3 . 28 Inflation 0.03 0.63 1 . 07 1 . 76 Output gap 0.17 0.45 0 . 88 1.20 MA signal 0 . 41 − 0.16 − 1.05 − 1.66 Momentum signal − 0.09 − 0.46 − 1.12 − 0.30 David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Drawbacks to individual PR forecasts Individual PR forecasts perform inconsistently/unevenly We can’t identify best predictor a priori Relying on individual PR forecast is too risky Too ‘hedgehogy’ We need to get foxy Incorporate info from multiple plausible predictors Forecast diversification (Timmermann 2006) Bad strategy: include all predictors in one regression Kitchen sink PR: ˆ α t + ˆ β 1 , t x 1 , t + · · · + ˆ R t + 1 = ˆ β K , t x K , t R 2 OS stats: − 0 . 95 % , − 6 . 22 % , − 5 . 25 % , − 9 . 64 % In-sample overfitting (avoid overfitting like the plague) David E. Rapach Forecasting Asset Returns
Monthly kitchen sink PR forecast 2 1 0 -1 1960 1970 1980 1990 2000 2010 David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Good foxy strategies Incorporate info from all predictors without overfitting Forecast combination (Rapach, Strauss, & Zhou 2010) Take simple average of individual PR forecasts Avoid overfitting by shrinking forecast to PM Shrink to ‘outside view’ R 2 OS stats: 0 . 77 % , 2 . 17 % , 2 . 52 % , 6 . 08 % Diffusion index (Ludvigson & Ng 2007) Extract first few principal components from all predictors PCs serve as predictors for PR forecast Filter noise in individual predictors ⇒ more reliable signal R 2 OS stats: 0 . 60 % , 1 . 62 % , 2 . 66 % , 6 . 97 % David E. Rapach Forecasting Asset Returns
Monthly combination forecast 2 1 0 -1 1960 1970 1980 1990 2000 2010 David E. Rapach Forecasting Asset Returns
Monthly diffusion index forecast 2 1 0 -1 1960 1970 1980 1990 2000 2010 David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Dynamic asset allocation MV investor allocates monthly across stocks & bills Allocation to risky stocks: w t = ( 1 /γ )(ˆ σ 2 R t + 1 / ˆ t + 1 ) Realistic portfolio constraint: − 0 . 5 ≤ w t ≤ 1 . 5 σ 2 Certainty equivalent return (CER): ˆ µ p − 0 . 5 γ ˆ p σ 2 µ p ( ˆ ˆ p ): portfolio mean (variance) over evaluation period Annualized CER gain vis-à-vis PM for γ = 5 Combination forecast: 1.79% Diffusion index forecast: 2.46% Return predictability is economically valuable NB: assuming ‘small’ investor David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Additional elements Combination weights (Rapach, Strauss, & Zhou 2010) Place more weight on particular forecasts NB: typically best to hew close to equal weighting Economic restrictions ⇒ ↓ estimation uncertainty Sign restrictions (Campbell & Thompson 2008) Valuation ratios (Ferreira & Santa-Clara 2011) Bayesian (Pettenuzzo, Timmermann, & Valkanov 2014) Useful even if not literally true (bias-efficiency tradeoff) Regime switching (Ang & Timmermann 2012) Markov switching (Henkel, Martin, & Nardari 2011) Time-varying parameters (Dangl & Halling 2012) David E. Rapach Forecasting Asset Returns
Dynamic asset allocation: two recent studies MKT components (Kong, Rapach, Strauss, & Zhou 2011) Allocate across 25 Fama-French size/value portfolios Combination forecasts of component portfolio returns Based on 39 predictor variables Combination forecasts valuable inputs for DAA US stocks/bonds/bills (Almadi, Suri, & Rapach 2014) Active portfolio management vis-à-vis 60/35/5 benchmark Diffusion index forecasts of stock/bond/bill returns Extracted from fundamental, macro, and technical variables Diffusion index forecasts valuable inputs for DAA Largest gains typically realized during contractions/crises David E. Rapach Forecasting Asset Returns
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