Factor Lab Daily Brief 2026-06-29
Momentum factor ICIR 2.70 continues reign; value factors universally failing; healthcare reversal signal holds
π Full Market Factor IC Test
Backtest Period: 39 weeks | Universe: S&P 500 constituents | Data: Daily TTM financial panel
| Factor | IC Mean | ICIR | IC>0 % | t-stat | p-value | Q1 Avg Ret | Q5 Avg Ret | Long-Short |
|---|---|---|---|---|---|---|---|---|
| Momentum (mom) | +0.224 | 2.70 | 100% | 16.62 | 0.000 | -0.12% | +7.95% | -8.07% |
| Volatility (vol) | +0.132 | 1.05 | 79.5% | 6.48 | 0.000 | +0.54% | +8.15% | -7.61% |
| Market Cap (size) | +0.048 | 1.25 | 87.2% | 7.70 | 0.000 | +2.45% | +4.51% | -2.06% |
| Earnings Yield (ep) | -0.062 | -0.74 | 17.9% | -4.57 | 0.000 | +6.41% | +2.54% | +3.87% |
| FCF Yield (fcf) | -0.059 | -1.43 | 7.7% | -8.79 | 0.000 | +5.64% | +2.60% | +3.04% |
| ROE | -0.041 | -1.23 | 12.8% | -7.58 | 0.000 | +4.82% | +3.71% | +1.11% |
| Book/Price (bp) | +0.006 | 0.08 | 46.2% | 0.48 | 0.635 | +3.88% | +3.06% | +0.82% |
β οΈ Q1 = lowest factor quintile, Q5 = highest. Long-Short = Q1 - Q5
Key Findings
1. Momentum Factor Absolute Dominance
- ICIR 2.70, positive IC in 100% of 39 weeks β momentum has worked every single rebalance
- Q5 (strongest momentum) avg weekly return +7.95%, Q1 (weakest) -0.12%
- Long-short spread -8.07%, shorting losers strategy delivering extraordinary annualized returns
2. High Volatility = High Returns (Extreme Risk-On)
- Volatility factor ICIR 1.05, high-vol stocks systematically outperforming low-vol
- Q5 (highest vol) +8.15% vs Q1 (lowest vol) +0.54%
- Classic risk-on signal β market is rewarding speculative behavior
3. Value Factors Universally Broken
- FCF Yield: ICIR -1.43, high-FCF stocks systematically underperforming (growth vs value)
- EP: ICIR -0.74, high earnings yield stocks performing worse
- BP: Essentially useless (ICIR 0.08, p=0.64), book value meaningless for stock selection
- Market completely ignoring fundamental valuations, driven purely by momentum and narrative
4. Market Cap Factor: Large Caps Dominating
- ICIR 1.25, large caps systematically outperforming small caps
- Q5 (largest cap) +4.51% vs Q1 (smallest cap) +2.45%
- Capital concentrating at the top, likely flight-to-quality + AI mega-cap pull
π Sector Momentum Decomposition
Momentum factor IC performance within each sector (same factor, tested per sector)
| Sector | IC Mean | ICIR | IC>0 % | Q1 Avg Ret | Q5 Avg Ret | Long-Short | Signal |
|---|---|---|---|---|---|---|---|
| Info Technology | +0.524 | 2.58 | 100% | -1.35% | +27.19% | -28.54% | π₯ Extreme |
| Industrials | +0.266 | 2.88 | 100% | -1.63% | +5.51% | -7.14% | π₯ Extreme |
| Financials | +0.309 | 2.63 | 100% | +0.61% | +7.80% | -7.19% | π₯ Extreme |
| Consumer Staples | +0.209 | 1.34 | 87.2% | -4.65% | +0.02% | -4.67% | π‘ Moderate |
| Utilities | +0.199 | 1.01 | 76.9% | -2.29% | -1.66% | -0.63% | π‘ Moderate |
| Real Estate | +0.124 | 0.84 | 74.4% | +1.12% | +4.95% | -3.83% | π‘ Moderate |
| Consumer Disc. | +0.252 | 2.11 | 100% | -4.05% | +2.15% | -6.21% | π’ Strong |
| Health Care | -0.128 | -1.21 | 15.4% | +4.84% | -2.66% | +7.51% | β οΈ Reversal |
Sector Insights
1. Information Technology: Momentum Returns at Crushing Scale
- Q5 group avg return +27.19%, long-short spread -28.54%
- Momentum strategy has never failed within IT over 39 weeks (100% positive IC)
- AI/semiconductor leaders continue to suck in capital,εΌΊθ ζεΌΊε°ζθ΄
2. Healthcare: Only Reversal Signal β οΈ
- ICIR -1.21, the only sector where momentum factor works in reverse
- Neglected healthcare stocks (Q1) surging +4.84%
- Possible explanation: post-oversold value recovery + defensive rotation attracting capital
3. Industrials/Financials: Robust Momentum
- Both sectors ICIR above 2.5, 100% positive IC
- Benefiting from infrastructure investment expectations and rate environment
π Summary
Current Market Characteristics:
- Pure Momentum-Driven β Fundamental factors (EP, BP, FCF, ROE) universally failing; market ignores valuations, trades only on trend
- Extreme Risk-On β High-volatility stocks outperforming low-volatility; speculative behavior rewarded
- Top-Heavy Concentration β Large caps dominating; capital flowing to IT/Financials/Industrials leaders
- Healthcare Reversal β Only contrarian-effective sector; potential next rotation direction
Strategy Implications:
- Trend-following strategies still effective, but watch for momentum crash risk (FNG in extreme fear territory)
- Healthcare reversal signal worth monitoring β potential harbinger of defensive rotation
- When value factors universally fail, it often signals major structural market changes