Constituent dispersion · breadth vs the index
XSD — SPDR S&P Semiconductor (EW)
Divergence over time — price vs breadth, by horizon
The hero read is the 1-month picture; here the same price↔breadth divergence across 1 week / 1 month / 1 quarter, computed over the 126-session history. A/D /name is net advancers-minus-decliners per covered constituent; % beating Δ and median−ETF Δ show how participation shifted. Price rising while those fall = the move is narrowing under the surface.
| Horizon | Price | A/D /name | % beating Δ | Median−ETF Δ | Read |
|---|---|---|---|---|---|
| 1 week | -4.35% | -0.74 | +10pp | +2.77pp | Confirming ↓ |
| 1 month | -6.01% | -0.93 | +10pp | +2.31pp | Confirming ↓ |
| 1 quarter | -25.73% | -4.16 | +8pp | +9.63pp | Confirming ↓ |
Over the last 126 sessions: price up +48.76%, breadth up (+8.33/name) · % beating 53→50 · median−ETF +1.18pp→+0.20pp.
Dispersion by window
| Window | ETF | Median | Median − ETF | Up / Down | Beat / Lag | ±1% band | Dispersion |
|---|---|---|---|---|---|---|---|
| 1d | +0.30% | +0.06% | -0.24pp | 24 / 19 | 17 / 26 | 27 of 43 | ±1.78% |
| 5d | -4.35% | -4.52% | -0.18pp | 10 / 33 | 21 / 22 | 6 of 43 | ±6.56% |
| 21d | -6.01% | -6.02% | +0.00pp | 13 / 30 | 21 / 22 | 4 of 43 | ±10.12% |
| YTD | +48.88% | +34.17% | -14.71pp | 33 / 8 | 16 / 25 | 0 of 41 | ±54.57% |
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)
- ALAB+3.17%+0.14pp
- INTC+1.80%+0.07pp
- PENG+2.19%+0.06pp
- MRVL+1.14%+0.06pp
- ON+1.81%+0.06pp
- AMBA-5.60%-0.1pp
- MXL-1.08%-0.06pp
- AVGO-2.74%-0.05pp
- NXPI-1.54%-0.03pp
- NVTS-0.98%-0.03pp
This month (21d)
- SMTC+11.67%+0.34pp
- MU+7.27%+0.27pp
- SITM+5.77%+0.18pp
- QCOM+7.01%+0.17pp
- PI+7.17%+0.14pp
- CRDO-26.92%-0.87pp
- MXL-11.87%-0.69pp
- ALAB-11.18%-0.5pp
- POWI-18.42%-0.47pp
- AMBA-22.57%-0.42pp
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)
- SMTC+11.67%
- KOPN+8.10%
- MU+7.27%
- PI+7.17%
- QCOM+7.01%
- CRDO-26.92%
- AOSL-24.86%
- CEVA-22.78%
- AMBA-22.57%
- NVEC-22.26%
XSD — constituent leadership race
$100 in each covered XSD constituent at 2025-12-30, rebased to 100. Watch leadership change hands.
Each covered constituent started at $100 at the window open; the bars race by total return (top 12 shown). Decision-support, not investment advice.
Constituents — 43 covered · click a column to sort
| Symbol | Weight | Last | 1d | 5d | 21d | YTD | RS rank |
|---|---|---|---|---|---|---|---|
| MXL Maxlinear Inc | 5.77% | 59.45 | -1.08% | -6.26% | -11.87% | — | 28 |
| MRVL Marvell Technology Inc | 4.93% | 208.83 | +1.14% | -13.51% | -1.04% | +146.04% | 67 |
| ALAB Astera Labs Inc | 4.50% | 282.82 | +3.17% | -6.99% | -11.18% | +70.00% | 33 |
| AMD Adv Micro Devices | 3.84% | 456.16 | -0.20% | -4.30% | -5.37% | +113.00% | 53 |
| INTC Intel Corp | 3.84% | 91.67 | +1.80% | -0.46% | -9.29% | +148.43% | 42 |
| MU Micron Technology | 3.75% | 958.16 | +0.22% | +2.43% | +7.27% | +235.85% | 93 |
| CRDO Credo Technology Group Holding Ltd | 3.23% | 164.17 | -0.64% | -31.66% | -26.92% | +14.09% | 0 |
| NVTS Navitas Semiconductor Corp | 3.13% | 11.10 | -0.98% | -11.27% | -10.12% | +55.46% | 35 |
| ON On Semiconductor | 3.06% | 73.65 | +1.81% | -1.54% | -4.24% | +36.01% | 56 |
| SITM Sitime Corp | 3.05% | 574.47 | +0.99% | -4.24% | +5.77% | +62.65% | 81 |
| SMTC Semtech Corp | 2.93% | 135.40 | +1.16% | -4.94% | +11.67% | +83.74% | 98 |
| PENG Penguin Solutions Inc | 2.75% | 48.63 | +2.19% | -7.28% | -12.72% | +148.62% | 21 |
| SYNA Synaptics Inc | 2.64% | 97.68 | +1.76% | +0.09% | -2.44% | +31.96% | 63 |
| POWI Power Integratn | 2.56% | 50.54 | +0.48% | -8.24% | -18.42% | +43.19% | 12 |
| MTSI Macom Technology S | 2.49% | 259.95 | +0.93% | -6.21% | -1.33% | +51.77% | 65 |
| ALGM Allegro Microsystems Inc | 2.40% | 35.56 | +0.25% | -5.40% | -14.93% | +34.80% | 14 |
| QCOM Qualcomm Inc | 2.37% | 168.57 | -0.28% | +2.86% | +7.01% | -0.82% | 88 |
| LSCC Lattice Semicond | 2.36% | 113.63 | -0.22% | -5.68% | -11.44% | +54.43% | 30 |
| TXN Texas Instruments | 2.27% | 253.83 | -0.38% | -4.77% | -8.60% | +47.26% | 44 |
| NXPI Nxp Semiconductors | 2.27% | 224.99 | -1.54% | -0.39% | -2.66% | +4.19% | 60 |
| RMBS Rambus Inc | 2.23% | 84.34 | -0.45% | -7.43% | -13.32% | -8.22% | 19 |
| MPWR Monolithic Power Sys | 2.22% | 1213.65 | -0.47% | -7.43% | -9.80% | +34.17% | 37 |
| MCHP Microchip Technology | 2.20% | 73.11 | +0.48% | -3.15% | -6.02% | +15.41% | 49 |
| PI Impinj Inc | 1.99% | 175.11 | +0.03% | +4.19% | +7.17% | +0.63% | 91 |
| SWKS Skyworks Solutions | 1.98% | 71.50 | -0.24% | +6.15% | +6.73% | +15.09% | 86 |
| FSLR First Solar Inc | 1.97% | 207.42 | +2.38% | -1.28% | -12.41% | -20.60% | 26 |
| RGTI Rigetti Computing Inc | 1.93% | 15.18 | +2.08% | -7.66% | -9.54% | -31.47% | 40 |
| ADI Analog Devices | 1.93% | 356.50 | +0.22% | -4.52% | -5.61% | +31.86% | 51 |
| AMBA Ambarella Inc | 1.87% | 63.38 | -5.60% | -10.93% | -22.57% | -10.53% | 7 |
| QRVO Qorvo Inc | 1.86% | 100.38 | -0.25% | +4.37% | +5.39% | +18.78% | 79 |
| CRUS Cirrus Logic Inc | 1.77% | 113.13 | +0.06% | +2.03% | -12.59% | -4.53% | 23 |
| DIOD Diodes Inc | 1.72% | 89.95 | -0.09% | -1.01% | +5.09% | +82.30% | 77 |
| AVGO Broadcom Ltd | 1.66% | 357.16 | -2.74% | -3.87% | -14.61% | +3.41% | 16 |
| NVDA Nvidia Corp | 1.65% | 228.45 | +1.80% | +0.21% | +4.21% | +22.64% | 74 |
| SLAB Silicon Labs Inc | 1.58% | 220.71 | +0.22% | +0.80% | +1.14% | +68.87% | 70 |
| OLED Universal Display | 1.36% | 82.64 | -1.10% | -2.60% | -3.83% | -28.86% | 58 |
| WOLF Wolfspeed Inc | 1.21% | 26.84 | +0.71% | -0.41% | +6.55% | +54.16% | 84 |
| CEVA Ceva Inc | 1.06% | 26.44 | +0.72% | -6.97% | -22.78% | +22.86% | 5 |
| INDI Indie Semiconductor Cl A | 0.95% | 3.47 | -2.80% | -14.11% | +2.36% | -1.70% | 72 |
| SKYT Skywater Technology Inc | 0.90% | 32.46 | +6.15% | +5.66% | -6.78% | +78.74% | 47 |
| KOPN Kopin Corp | 0.75% | 4.27 | -0.47% | -11.41% | +8.10% | +82.48% | 95 |
| AOSL Alpha and Omega Semi | 0.72% | 24.45 | -0.69% | -6.79% | -24.86% | +23.42% | 2 |
| NVEC Nve Corp | 0.28% | 98.56 | +0.06% | -7.96% | -22.26% | — | 9 |
RS rank = the constituent's 21-day return percentile within the index (100 = strongest of the covered names). Weight is the index weight; returns use adjusted closes. Default sort: weight.
Other ETFs & indices
Dispersion is computed across the constituents we cover in our data lake (see coverage badge). Decision-support, not investment advice.
FAQ · from the current data
XSD dispersion — data Q&A
Is XSD's move broad or carried by a few names (21 sessions)?
As of 2026-09-03: over 21 sessions the fund returned -6.01% while its median constituent returned -6.02% — a dispersion of 10.12 pp; 49% of 43 members beat the fund. Broad decline - breadth is falling with price.
How did XSD's members trade in the last session?
As of 2026-09-03: fund +0.30%, median member +0.06%, 24 advancers vs 19 decliners.
What does the dispersion page for XSD measure?
It splits the fund into its members: the fund's own return against the median constituent, how many members beat the fund, advancers vs decliners, and a cumulative advance/decline line that tends to lead price. A firm fund price with a weak median and a falling A/D line is a narrow, top-heavy tape; a broad move shows the median keeping up. 43 constituents covered, re-baked nightly from the Closelook lake.
Is this investment advice?
No — a data surface in an investment research diary. It describes breadth inside a fund; it makes no recommendation.