Constituent dispersion · breadth vs the index
XLB — Materials Select Sector
Concentration 38.46% in top 5 17.73 effective names · HHI 564
RS vs S&P 500 21d +3.30pp sector return − SPY
RS vs Nasdaq-100 21d +1.86pp sector return − QQQ
Broad advance - breadth is rising with price. Last 21 sessions — price +4.81% · A/D +52 (+2/name)
XLB price
Cumulative advance / decline of constituents — rises when more names are up than down; turns before price at inflections
Dispersion by window
| Window | ETF | Median | Median − ETF | Up / Down | Beat / Lag | ±1% band | Dispersion |
|---|---|---|---|---|---|---|---|
| 1d | +0.42% | +0.24% | -0.18pp | 15 / 11 | 12 / 14 | 8 of 26 | ±2.07% |
| 5d | +3.84% | +5.41% | +1.57pp | 21 / 5 | 16 / 10 | 3 of 26 | ±4.16% |
| 21d | +4.81% | +2.45% | -2.36pp | 18 / 8 | 10 / 16 | 1 of 26 | ±9.2% |
| YTD | +16.77% | +15.09% | -1.68pp | 19 / 6 | 12 / 13 | 3 of 25 | ±20.98% |
Median − ETF below zero means the typical name is lagging the cap-weighted index — the move is top-heavy. "Beat" counts constituents outperforming the ETF over the window. Dispersion is the cross-sectional standard deviation of constituent returns — high = a stock-picker's tape, low = pure beta.
What drove the move — contribution = weight × return
Today (1d)
- NEM+5.56%+0.36pp
- CRH+2.92%+0.13pp
- VMC+2.28%+0.1pp
- ECL+2.25%+0.09pp
- MLM+2.00%+0.08pp
- NUE-2.64%-0.18pp
- STLD-3.74%-0.17pp
- LIN-0.63%-0.09pp
- DOW-1.83%-0.05pp
- CF-2.36%-0.05pp
This month (21d)
- NUE+11.37%+0.75pp
- STLD+15.98%+0.75pp
- FCX+11.33%+0.67pp
- PPG+14.74%+0.47pp
- ECL+10.60%+0.43pp
- NEM-8.84%-0.58pp
- DOW-13.44%-0.39pp
- CTVA-8.90%-0.37pp
- CF-12.71%-0.26pp
- LYB-12.70%-0.25pp
Each name's contribution = its index weight × its return — the percentage points it added to (green) or subtracted from (red) the ETF's move. Computed across covered names.
Leaders & laggards (21-day)
- IP+16.87%
- STLD+15.98%
- PPG+14.74%
- SW+12.49%
- NUE+11.37%
- DOW-13.44%
- CF-12.71%
- LYB-12.70%
- CTVA-8.90%
- NEM-8.84%
Other ETFs & indices
Dispersion is computed across the constituents we cover in our data lake (see coverage badge). Decision-support, not investment advice.