Lab · Sector Dispersion
Breadth vs the sector.
Most screens show the sector's price. These show what its members are doing underneath — is the move broad, or carried by a few mega-caps? Median constituent vs the index, advancers vs decliners, how many names beat the index, and a cumulative advance/decline line that tends to turn before price. 40 ETFs & index cuts · closes through 2026-09-03.
What changed below the surface · 21-day
Where the constituents' advance/decline is pulling away from the ETF's price — the early read, before the headline reflects it.
Improving — breadth rising under flat/soft price
- IXPGlobal Communicationsprice +0.8% · A/D 1m +2.43 · 1q +1.57 /nm
- XLPConsumer Staples Select Sectorprice -0.08% · A/D 1m +0.39 · 1q +3.14 /nm
- QQEWFirst Trust Nasdaq-100 Equal Weightprice +0.69% · A/D 1m +0.31 · 1q +0.73 /nm
- QQXTFirst Trust Nasdaq-100 Ex-Technologyprice +0.56% · A/D 1m +0.3 · 1q +1.91 /nm
- XLUUtilities Select Sectorprice -1.44% · A/D 1m +0.29 · 1q +1.45 /nm
Weakening — breadth falling under firm price
- AEIAgentic Ecosystem Index (EW)price +1.24% · A/D 1m -1.76 · 1q -1 /nm
- XLBMaterials Select Sectorprice -0.04% · A/D 1m -1.31 · 1q +0.19 /nm
- DTCRGlobal X Data Center & Digital Infraprice -0.92% · A/D 1m -1.15 · 1q -5.1 /nm
- QTOPiShares Nasdaq-100 Top 30price -0.13% · A/D 1m -0.74 · 1q -2.23 /nm
- KXIGlobal Staplesprice -1% · A/D 1m -0.43 · 1q +2.25 /nm
- XLKTechnology Select Sectorprice +0.03% · A/D 1m -0.42 · 1q -1 /nm
- ARKKARK Innovationprice +14.39% · A/D 1m -0.33 · 1q -2.81 /nm
- IXNiShares Global Techprice +0.92% · A/D 1m -0.29 · 1q -1.07 /nm
- XLFFinancial Select Sectorprice +0.97% · A/D 1m -0.12 · 1q +5.71 /nm
- AIQGlobal X AI & Technologyprice +3.11% · A/D 1m -0.09 · 1q -2.5 /nm
Closelook indices
S&P 500 sectors
Nasdaq-100 cuts
Tech & thematics
Global
Computed across the constituents we cover in our data lake (coverage shown per card). A/D line = cumulative daily advancers minus decliners. Decision-support, not investment advice.
FAQ · from the current data · as of 2026-09-03
Quick answers
What does this dispersion tool measure?
For each ETF or index it compares the median constituent return to the ETF/benchmark return, counts advancers versus decliners, and tracks a cumulative advance/decline line that tends to lead price — showing whether a move is broad-based or carried by a handful of mega-caps.
How many ETFs and index cuts are tracked, and as of when?
40 ETFs and index cuts across five groups — Closelook indices, S&P 500 sectors, Nasdaq-100 cuts, tech & thematics, and global — with closes through 2026-09-03.
Which sector shows the widest breadth divergence today?
As of 2026-09-03, ARKK (ARK Innovation) shows the widest gap between its median constituent and the ETF itself: median -2.93pp versus the ETF's +4.50%, with 30 advancers against 11 decliners.
Which sectors are improving or weakening on a 21-day view?
As of 2026-09-03, 5 ETFs show improving breadth (advance/decline rising under flat or soft price), led by IXP, and 10 show weakening breadth (advance/decline falling under firm price), led by AEI.
How is the advance/decline line computed?
It is the cumulative daily count of constituent advancers minus decliners, computed across the constituents held in the Closelook data lake — coverage is shown per ETF card.