Factor Lab Daily Brief 2026-09-08
Momentum factor reverses across all sectors: sector momentum IC flips from positive to deeply negative, IT at -0.52. FCF Yield, ROE, SIZE all turn negative. 6 red alerts triggered.
Factor Lab Daily Brief β 2026-09-08
Factor IC Summary
| Factor | IC Mean | ICIR | p-value | Long-Short | Signal |
|---|---|---|---|---|---|
| EP | -0.0480 | -0.52 | 0.0002 | +2.98% | β Significant |
| BP | +0.0030 | +0.05 | 0.73 | +1.13% | Insignificant |
| FCF Yield | -0.0352 | -0.54 | 0.0001 | +2.48% | β Significant |
| ROE | -0.0248 | -0.68 | <0.0001 | +0.76% | β Significant |
| MOM | -0.2226 | -1.96 | <0.0001 | +6.77% | ββ Highly significant |
| VOL | +0.0339 | +0.18 | 0.27 | -1.21% | Insignificant |
| SIZE | -0.0660 | -0.90 | 0.000002 | +3.99% | β Significant |
β‘ Key Signal: Momentum IC flipped from positive to -0.22 (ICIR=-1.96) β a rare systemic reversal.
Sector Momentum Decomposition
| Sector | IC | ICIR | Long-Short | Signal |
|---|---|---|---|---|
| Information Technology | -0.5164 | -2.26 | +20.72% | π΄ Extreme reversal |
| Financials | -0.2998 | -1.88 | +5.65% | π΄ Reversal |
| Industrials | -0.2516 | -1.78 | +8.84% | π΄ Reversal |
| Consumer Staples | -0.1386 | -0.88 | +5.71% | π΄ Reversal |
| Consumer Discretionary | -0.0865 | -0.55 | +2.65% | π΄ Reversal |
| Utilities | -0.0345 | -0.20 | +0.27% | π΄ Reversal |
| Health Care | -0.0785 | -0.34 | +1.18% | Insignificant |
| Real Estate | +0.1968 | +0.63 | -3.54% | Only positive |
Key Observations
- IT sector reversal is extreme: IC=-0.52 (historical mean +0.39), z-score=-2.78. AI-narrative-driven high-valuation tech stocks are experiencing a severe momentum crash.
- 7 of 8 sectors flipped from positive to negative momentum: This signals a systemic style shift, not idiosyncratic noise.
- SIZE factor remains significantly negative: Small caps outperforming large caps β classic risk-off signature.
Anomaly Detection Report
π΄ Red Alerts (6 sector momentum flips)
- mom / Consumer Discretionary: IC=-0.0865, z=-2.32 β flipped from +0.20 to -0.09
- mom / Consumer Staples: IC=-0.1386, z=-2.18 β flipped from +0.15 to -0.14
- mom / Financials: IC=-0.2998, z=-2.72 β flipped from +0.23 to -0.30
- mom / Industrials: IC=-0.2516, z=-2.60 β flipped from +0.20 to -0.25
- mom / Information Technology: IC=-0.5164, z=-2.78 β flipped from +0.39 to -0.52
- mom / Utilities: IC=-0.0345, z=-2.41 β flipped from +0.17 to -0.03, p-value no longer significant
β οΈ Statistical Anomalies
All 6 flagged sectors have ICs exceeding their historical mean by more than 2Ο in the same direction (positive β negative). This is not random noise β it is a systematic style flip.
Strategic Implications
- Momentum factorε ¨ι’ε€±ζ: The classic buy-winners/sell-losers strategy faces severe drawdown risk in the current regime.
- Value factors (FCF Yield, EP) reversed: Market rotating from growth narratives to low-valuation preference.
- SIZE factor remains effective: Small-cap relative outperformance confirms risk-averse environment.
- Real Estate is the only haven: Only sector with positive momentum IC.
Charts
