Research Affiliates examines why simple return forecasting models can outperform more complex frameworks when building long horizon portfolios. The paper argues valuation driven, yield based models better identify undervalued assets, even after value strategies lagged growth in six of the prior nine years.
Forecasting Returns: Simple Is Not Simplistic
Research Affiliates
Jim Masturzo
Research
7 Pages
Key Takeaways
Past Return Trap: Assets forecasted to return between −2% and 0% ultimately delivered median 10 year returns of 11.6% annually, exposing weaknesses in backward looking allocation models.
Sharpe Ratio Limits: The constant Sharpe ratio framework capped forecasts between 0% and 12%, limiting its ability to capture deeply distressed or unusually attractive asset classes.
Yield Signals Matter: Research Affiliates’ model produced median realized returns of 12.8% in its highest forecast bucket, supporting long horizon mean reversion despite short term volatility.
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