Constituent dispersion · breadth vs the index
XLC — Communication Services Select Sector
Concentration 40.51% in top 5 16.81 effective names · HHI 595
RS vs S&P 500 21d -4.75pp sector return − SPY
RS vs Nasdaq-100 21d -6.19pp sector return − QQQ
Broad decline - breadth is falling with price. Last 21 sessions — price -3.24% · A/D -18 (-0.78/name)
XLC 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 | +0.12% | -0.22% | -0.34pp | 8 / 15 | 7 / 16 | 12 of 23 | ±5.06% |
| 5d | +0.75% | +1.45% | +0.69pp | 15 / 8 | 13 / 10 | 4 of 23 | ±6.64% |
| 21d | -3.24% | -2.28% | +0.96pp | 7 / 16 | 13 / 10 | 3 of 23 | ±5.96% |
| YTD | -4.28% | -7.70% | -3.42pp | 5 / 18 | 9 / 14 | 3 of 23 | ±17.34% |
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)
- TTWO+6.35%+0.3pp
- META+1.13%+0.15pp
- SATS+3.32%+0.14pp
- GOOGL+1.06%+0.1pp
- LYV+1.94%+0.1pp
- FOXA-16.84%-0.5pp
- FOX-15.22%-0.28pp
- NFLX-3.61%-0.14pp
- TMUS-2.38%-0.09pp
- CMCSA-1.29%-0.05pp
This month (21d)
- OMC+6.89%+0.31pp
- LYV+3.45%+0.17pp
- TKO+4.51%+0.17pp
- EA+1.19%+0.05pp
- PSKY+3.76%+0.03pp
- GOOGL-5.93%-0.58pp
- SATS-12.76%-0.54pp
- FOXA-16.17%-0.48pp
- GOOG-5.65%-0.44pp
- NFLX-9.54%-0.36pp
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)
- OMC+6.89%
- TKO+4.51%
- PSKY+3.76%
- LYV+3.45%
- EA+1.19%
- FOXA-16.17%
- FOX-14.75%
- SATS-12.76%
- NFLX-9.54%
- GOOGL-5.93%
Other ETFs & indices
Dispersion is computed across the constituents we cover in our data lake (see coverage badge). Decision-support, not investment advice.