ReturnSkew3F · Risk · Bali, Engle and Murray (2015)

Idiosyncratic skewness (3F model)

Long minus short decile portfolio, value-weighted, market-adjusted. Quarterly, 1926Q4 to 2024Q4.

Expected return · posterior mean, % per year, averaged over the window
Next quarter
2026Q4
−1.44%
95% interval −3.26% to 0.48%
Next year
2026Q4–2027Q3
−1.39%
95% interval −3.27% to 0.57%
Next five years
2026Q4–2031Q3
−1.15%
95% interval −3.30% to 1.00%

Forecast made 16 Sep 2026, conditioning on this portfolio's OAP returns, which end 2024Q4. The 7 quarters between then and 2026Q4 are unobserved and are integrated out under the model.

Cumulative market-adjusted return

−47% since 1926Q4 · log scale

Past performance, annualized

Window Mean Vol. Sharpe t
1926Q4–2024Q4 −0.25% 8.86% −0.03 −0.27
2020Q1–2024Q4 −3.77% 7.16% −0.53 −1.18
2024Q1–2024Q4 1.89% 7.07% 0.27 0.27

Forecast Sharpe ratio, annualized

Window Mean 95% interval P(neg)
2026Q4 −0.16 −0.37 – 0.05 0.93
2026Q4–2027Q3 −0.15 −0.35 – 0.06 0.92
2026Q4–2031Q3 −0.10 −0.27 – 0.09 0.85
Category
Risk
Form
Continuous
Data
Price
Sorted on
Low minus high
Names per leg
480 long / 480 short median · 73 at the 10th pctile
Original sample
1963–2012