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 | +1.79% | +0.79 | +2pp | -1.89pp | Confirming ↑ |
| 1 month | -3.57% | -0.37 | -12pp | -3.92pp | Confirming ↓ |
| 1 quarter | -15.81% | -2.26 | -4pp | +1.82pp | Confirming ↓ |
Over the last 126 sessions: price up +50.76%, breadth up (+8.07/name) · % beating 51→38 · median−ETF +0.13pp→-4.84pp.
Dispersion by window
| Window | ETF | Median | Median − ETF | Up / Down | Beat / Lag | ±1% band | Dispersion |
|---|---|---|---|---|---|---|---|
| 1d | +4.06% | +4.10% | +0.04pp | 41 / 2 | 22 / 21 | 8 of 43 | ±2.84% |
| 5d | +1.79% | +0.45% | -1.35pp | 25 / 18 | 18 / 25 | 2 of 43 | ±4.7% |
| 21d | -3.57% | -8.39% | -4.82pp | 13 / 30 | 16 / 27 | 2 of 43 | ±14.02% |
| YTD | +55.33% | +36.36% | -18.97pp | 35 / 6 | 13 / 28 | 1 of 41 | ±63.55% |
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)
- MXL+7.88%+0.45pp
- ALAB+9.06%+0.41pp
- INTC+7.67%+0.29pp
- SITM+9.05%+0.28pp
- PENG+8.93%+0.25pp
- TXN-0.97%-0.02pp
- SLAB+0.00%0pp
This month (21d)
- SMTC+31.77%+0.93pp
- SWKS+35.43%+0.7pp
- MRVL+11.46%+0.57pp
- AMD+12.53%+0.48pp
- INTC+12.52%+0.48pp
- CRDO-31.60%-1.02pp
- NVTS-15.41%-0.48pp
- ON-14.00%-0.43pp
- POWI-16.11%-0.41pp
- ALGM-15.94%-0.38pp
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)
- SWKS+35.43%
- SMTC+31.77%
- QRVO+24.88%
- QCOM+17.80%
- AMD+12.53%
- CRDO-31.60%
- INDI-27.88%
- WOLF-24.54%
- POWI-16.11%
- ALGM-15.94%
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% | 74.99 | +7.88% | +8.15% | +3.25% | — | 77 |
| MRVL Marvell Technology Inc | 4.93% | 240.76 | +4.81% | +6.08% | +11.46% | +183.66% | 84 |
| ALAB Astera Labs Inc | 4.50% | 293.56 | +9.06% | +3.17% | -3.26% | +76.46% | 63 |
| AMD Adv Micro Devices | 3.84% | 545.09 | +6.36% | +8.24% | +12.53% | +154.52% | 88 |
| INTC Intel Corp | 3.84% | 108.80 | +7.67% | +8.45% | +12.52% | +194.85% | 86 |
| MU Micron Technology | 3.75% | 977.50 | +5.50% | +0.01% | +3.91% | +242.63% | 79 |
| CRDO Credo Technology Group Holding Ltd | 3.23% | 168.25 | +4.19% | +4.95% | -31.60% | +16.93% | 0 |
| NVTS Navitas Semiconductor Corp | 3.13% | 11.14 | +6.30% | -0.09% | -15.41% | +56.02% | 12 |
| ON On Semiconductor | 3.06% | 68.30 | +2.55% | -2.66% | -14.00% | +26.13% | 14 |
| SITM Sitime Corp | 3.05% | 598.60 | +9.05% | -0.61% | -11.98% | +69.48% | 26 |
| SMTC Semtech Corp | 2.93% | 178.19 | +6.35% | +11.98% | +31.77% | +141.81% | 95 |
| PENG Penguin Solutions Inc | 2.75% | 52.55 | +8.93% | +8.08% | -9.96% | +168.66% | 35 |
| SYNA Synaptics Inc | 2.64% | 91.12 | +2.11% | -2.51% | -13.08% | +23.10% | 16 |
| POWI Power Integratn | 2.56% | 49.15 | +3.15% | -1.09% | -16.11% | +39.25% | 7 |
| MTSI Macom Technology S | 2.49% | 263.14 | +4.52% | -3.41% | -10.15% | +53.63% | 33 |
| ALGM Allegro Microsystems Inc | 2.40% | 33.11 | +0.27% | -6.12% | -15.94% | +25.51% | 9 |
| QCOM Qualcomm Inc | 2.37% | 188.71 | +2.09% | +6.69% | +17.80% | +11.03% | 91 |
| LSCC Lattice Semicond | 2.36% | 108.53 | +2.08% | -4.92% | -12.62% | +47.50% | 19 |
| TXN Texas Instruments | 2.27% | 258.14 | -0.97% | -0.26% | -5.18% | +49.76% | 58 |
| NXPI Nxp Semiconductors | 2.27% | 227.95 | +4.10% | +1.11% | -0.27% | +5.56% | 65 |
| RMBS Rambus Inc | 2.23% | 85.87 | +5.48% | +0.61% | -8.37% | -6.55% | 51 |
| MPWR Monolithic Power Sys | 2.22% | 1169.58 | +1.91% | -1.39% | -12.27% | +29.30% | 23 |
| MCHP Microchip Technology | 2.20% | 70.82 | +1.77% | -1.06% | -8.88% | +11.80% | 40 |
| PI Impinj Inc | 1.99% | 179.73 | +1.21% | +4.62% | +6.94% | +3.29% | 81 |
| SWKS Skyworks Solutions | 1.98% | 91.32 | +6.69% | +8.68% | +35.43% | +47.00% | 98 |
| FSLR First Solar Inc | 1.97% | 201.16 | +5.28% | -2.90% | -8.57% | -23.00% | 44 |
| RGTI Rigetti Computing Inc | 1.93% | 15.99 | +8.11% | +5.47% | -9.71% | -27.81% | 37 |
| ADI Analog Devices | 1.93% | 362.65 | +0.17% | +0.39% | -3.71% | +34.14% | 60 |
| AMBA Ambarella Inc | 1.87% | 66.91 | +6.60% | -1.41% | -10.57% | -5.55% | 30 |
| QRVO Qorvo Inc | 1.86% | 119.51 | +4.86% | +6.36% | +24.88% | +41.42% | 93 |
| CRUS Cirrus Logic Inc | 1.77% | 120.37 | +2.01% | +3.34% | +2.99% | +1.58% | 74 |
| DIOD Diodes Inc | 1.72% | 90.79 | +1.52% | -0.95% | -8.39% | +84.01% | 49 |
| AVGO Broadcom Ltd | 1.66% | 347.30 | +2.29% | -3.75% | -8.61% | +0.56% | 42 |
| NVDA Nvidia Corp | 1.65% | 219.34 | +2.54% | +0.45% | -0.18% | +17.75% | 67 |
| SLAB Silicon Labs Inc | 1.58% | 219.70 | +0.00% | +0.25% | +0.32% | +68.09% | 70 |
| OLED Universal Display | 1.36% | 77.33 | +1.34% | -4.10% | -8.43% | -33.43% | 47 |
| WOLF Wolfspeed Inc | 1.21% | 23.74 | +0.30% | -5.68% | -24.54% | +36.36% | 5 |
| CEVA Ceva Inc | 1.06% | 29.83 | +7.26% | +6.69% | +0.54% | +38.62% | 72 |
| INDI Indie Semiconductor Cl A | 0.95% | 3.13 | +3.64% | -5.44% | -27.88% | -11.33% | 2 |
| SKYT Skywater Technology Inc | 0.90% | 32.46 | +6.15% | +5.66% | -6.78% | +78.74% | 53 |
| KOPN Kopin Corp | 0.75% | 4.73 | +8.99% | +7.74% | -6.15% | +102.14% | 56 |
| AOSL Alpha and Omega Semi | 0.72% | 25.21 | +2.06% | +1.61% | -11.17% | +27.26% | 28 |
| NVEC Nve Corp | 0.28% | 100.55 | +3.14% | +3.00% | -12.40% | — | 21 |
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 2026-09-17: over 21 sessions the fund returned -3.57% while its median constituent returned -8.39% — a dispersion of 14.02 pp; 37% 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 2026-09-17: fund +4.06%, median member +4.10%, 41 advancers vs 2 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.