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 | -3.29% | -0.37 | +0pp | -0.20pp | Confirming ↓ |
| 1 month | -0.25% | -0.56 | -8pp | -5.30pp | Weakening |
| 1 quarter | -21.40% | -4.02 | +5pp | +3.30pp | Confirming ↓ |
Over the last 126 sessions: price up +35.44%, breadth up (+5.49/name) · % beating 37→45 · median−ETF -2.86pp→-1.33pp.
Dispersion by window
| Window | ETF | Median | Median − ETF | Up / Down | Beat / Lag | ±1% band | Dispersion |
|---|---|---|---|---|---|---|---|
| 1d | -3.68% | -3.39% | +0.29pp | 2 / 41 | 23 / 20 | 13 of 43 | ±2.88% |
| 5d | -3.29% | -3.11% | +0.18pp | 10 / 33 | 22 / 21 | 9 of 43 | ±4.3% |
| 21d | -0.25% | -1.82% | -1.57pp | 19 / 24 | 19 / 24 | 2 of 43 | ±10.88% |
| YTD | +49.91% | +35.60% | -14.31pp | 33 / 8 | 17 / 24 | 1 of 41 | ±54.17% |
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)
- SKYT+6.15%+0.06pp
- PI+1.18%+0.02pp
- MRVL-10.28%-0.51pp
- NVTS-8.15%-0.26pp
- SMTC-7.91%-0.23pp
- ALAB-4.81%-0.22pp
- SITM-7.01%-0.21pp
This month (21d)
- MRVL+18.18%+0.9pp
- CRDO+15.75%+0.51pp
- SMTC+14.45%+0.42pp
- PI+15.30%+0.3pp
- MU+6.65%+0.25pp
- MXL-7.76%-0.45pp
- ON-13.29%-0.41pp
- POWI-15.38%-0.39pp
- SYNA-12.65%-0.33pp
- ALGM-13.70%-0.33pp
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)
- KOPN+25.14%
- INDI+19.62%
- MRVL+18.18%
- CRDO+15.75%
- PI+15.30%
- AOSL-20.83%
- CRUS-17.73%
- CEVA-17.54%
- POWI-15.38%
- ALGM-13.70%
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% | 61.73 | -2.66% | -7.33% | -7.76% | — | 23 |
| MRVL Marvell Technology Inc | 4.93% | 216.62 | -10.28% | -8.61% | +18.18% | +155.22% | 93 |
| ALAB Astera Labs Inc | 4.50% | 289.47 | -4.81% | +1.58% | -3.41% | +74.00% | 44 |
| AMD Adv Micro Devices | 3.84% | 465.58 | -2.33% | -1.62% | -4.08% | +117.40% | 40 |
| INTC Intel Corp | 3.84% | 89.47 | -2.85% | -0.67% | -1.82% | +142.47% | 49 |
| MU Micron Technology | 3.75% | 932.86 | -0.27% | -3.51% | +6.65% | +226.99% | 72 |
| CRDO Credo Technology Group Holding Ltd | 3.23% | 232.75 | -3.12% | +0.95% | +15.75% | +61.76% | 91 |
| NVTS Navitas Semiconductor Corp | 3.13% | 11.49 | -8.15% | -11.41% | +4.36% | +60.92% | 60 |
| ON On Semiconductor | 3.06% | 72.61 | -2.93% | -2.16% | -13.29% | +34.09% | 12 |
| SITM Sitime Corp | 3.05% | 557.86 | -7.01% | -9.27% | +5.68% | +57.95% | 70 |
| SMTC Semtech Corp | 2.93% | 131.17 | -7.91% | +5.71% | +14.45% | +78.00% | 86 |
| PENG Penguin Solutions Inc | 2.75% | 49.51 | -5.61% | -5.91% | -3.73% | +153.12% | 42 |
| SYNA Synaptics Inc | 2.64% | 95.08 | -2.57% | -2.64% | -12.65% | +28.45% | 14 |
| POWI Power Integratn | 2.56% | 51.51 | -6.87% | -6.65% | -15.38% | +45.94% | 7 |
| MTSI Macom Technology S | 2.49% | 265.27 | -4.29% | -0.50% | +6.66% | +54.88% | 74 |
| ALGM Allegro Microsystems Inc | 2.40% | 35.77 | -4.84% | -3.74% | -13.70% | +35.60% | 9 |
| QCOM Qualcomm Inc | 2.37% | 164.19 | -0.36% | +2.14% | +8.30% | -3.39% | 79 |
| LSCC Lattice Semicond | 2.36% | 114.40 | -5.04% | -2.80% | -8.13% | +55.48% | 21 |
| TXN Texas Instruments | 2.27% | 258.64 | -2.96% | -2.16% | -6.74% | +50.05% | 28 |
| NXPI Nxp Semiconductors | 2.27% | 223.58 | -1.01% | -0.88% | -8.80% | +3.54% | 19 |
| RMBS Rambus Inc | 2.23% | 85.76 | -5.87% | -6.01% | -4.26% | -6.67% | 37 |
| MPWR Monolithic Power Sys | 2.22% | 1256.26 | -4.18% | -4.56% | -4.55% | +38.88% | 35 |
| MCHP Microchip Technology | 2.20% | 72.93 | -3.39% | -3.56% | -2.77% | +15.13% | 47 |
| PI Impinj Inc | 1.99% | 170.06 | +1.18% | +2.73% | +15.30% | -2.27% | 88 |
| SWKS Skyworks Solutions | 1.98% | 65.79 | -2.33% | -2.01% | +5.30% | +5.90% | 67 |
| FSLR First Solar Inc | 1.97% | 204.46 | -2.68% | -4.58% | -0.75% | -21.73% | 53 |
| RGTI Rigetti Computing Inc | 1.93% | 15.59 | -5.17% | -12.95% | +4.91% | -29.62% | 65 |
| ADI Analog Devices | 1.93% | 361.78 | -3.40% | -3.03% | -1.33% | +33.82% | 51 |
| AMBA Ambarella Inc | 1.87% | 70.63 | -0.74% | -4.20% | -4.67% | -0.30% | 33 |
| QRVO Qorvo Inc | 1.86% | 94.73 | -1.51% | -0.87% | +4.40% | +12.09% | 63 |
| CRUS Cirrus Logic Inc | 1.77% | 108.48 | -2.16% | -5.94% | -17.73% | -8.46% | 2 |
| DIOD Diodes Inc | 1.72% | 88.00 | -3.15% | -6.42% | +7.32% | +78.35% | 77 |
| AVGO Broadcom Ltd | 1.66% | 368.79 | -0.74% | +0.09% | -4.91% | +6.78% | 30 |
| NVDA Nvidia Corp | 1.65% | 217.55 | -4.57% | +1.32% | +11.54% | +16.79% | 84 |
| SLAB Silicon Labs Inc | 1.58% | 218.54 | -0.19% | +0.25% | +0.74% | +67.21% | 56 |
| OLED Universal Display | 1.36% | 82.98 | -2.20% | -3.33% | +3.26% | -28.57% | 58 |
| WOLF Wolfspeed Inc | 1.21% | 25.85 | -4.08% | +0.35% | +8.66% | +48.48% | 81 |
| CEVA Ceva Inc | 1.06% | 27.12 | -4.57% | -3.11% | -17.54% | +26.02% | 5 |
| INDI Indie Semiconductor Cl A | 0.95% | 3.78 | -6.44% | -8.92% | +19.62% | +7.08% | 95 |
| SKYT Skywater Technology Inc | 0.90% | 32.46 | +6.15% | +5.66% | -6.78% | +78.74% | 26 |
| KOPN Kopin Corp | 0.75% | 4.48 | -7.05% | -11.11% | +25.14% | +91.45% | 98 |
| AOSL Alpha and Omega Semi | 0.72% | 24.63 | -6.10% | -6.67% | -20.83% | +24.33% | 0 |
| NVEC Nve Corp | 0.28% | 100.89 | -5.78% | -8.19% | -11.37% | — | 16 |
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 2026-08-28: over 21 sessions the fund returned -0.25% while its median constituent returned -1.82% — a dispersion of 10.88 pp; 44% of 43 members beat the fund. Weakening below the surface - the A/D line is falling while price holds up; leadership is narrowing.
How did XSD's members trade in the last session?
As of 2026-08-28: fund -3.68%, median member -3.39%, 2 advancers vs 41 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.