Constituent dispersion · breadth vs the index
XLK — Technology Select Sector
Concentration 44.53% in top 5 18.38 effective names · HHI 544
RS vs S&P 500 21d +5.96pp sector return − SPY
RS vs Nasdaq-100 21d +3.49pp sector return − QQQ
Broad advance - breadth is rising with price. Last 21 sessions — price +6.85% · A/D +47 (+0.65/name)
XLK 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 | +3.78% | +2.07% | -1.71pp | 58 / 14 | 21 / 51 | 14 of 72 | ±3.4% |
| 5d | +4.13% | +0.17% | -3.96pp | 38 / 34 | 26 / 46 | 4 of 72 | ±9.81% |
| 21d | +6.85% | +4.98% | -1.87pp | 47 / 24 | 33 / 38 | 4 of 71 | ±17.14% |
| YTD | +33.38% | +23.03% | -10.35pp | 46 / 25 | 32 / 39 | 0 of 71 | ±119.8% |
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)
- MU+10.84%+0.77pp
- NVDA+3.54%+0.46pp
- AMD+6.98%+0.37pp
- AAPL+1.82%+0.2pp
- WDC+16.09%+0.2pp
- CSCO-0.77%-0.02pp
- IBM-1.30%-0.02pp
- ACN-2.89%-0.02pp
- CRM-0.81%-0.01pp
- CTSH-2.59%0pp
This month (21d)
- MU+40.20%+2.85pp
- AMD+21.69%+1.16pp
- SNDK+52.44%+0.99pp
- AMAT+33.13%+0.96pp
- LRCX+30.01%+0.88pp
- NVDA-9.88%-1.3pp
- AVGO-10.43%-0.5pp
- MSFT-2.15%-0.16pp
- INTU-25.51%-0.13pp
- GLW-9.79%-0.09pp
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)
- DELL+65.02%
- SNDK+52.44%
- HPE+43.63%
- MU+40.20%
- NTAP+34.93%
- INTU-25.51%
- CIEN-21.66%
- PTC-17.88%
- ADSK-15.08%
- AKAM-13.79%
Other ETFs & indices
Dispersion is computed across the constituents we cover in our data lake (see coverage badge). Decision-support, not investment advice.