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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 2026-08-28.

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

Weakening — breadth falling under firm price

Closelook indices

RUBIN 125/126 · 99% wt
Rubin Build-Out 100 (EW)
+0.00% med -2.84pp 24 / 99
HALO 99/100 · 99% wt
HALO Growth 100 (EW)
-0.22% med -0.50pp 40 / 59
AEI 34/34
Agentic Ecosystem Index (EW)
+6.81% med -9.76pp 10 / 24
EUROAI 61/65 · 94% wt
Euro-AI Sovereign 50 (EW)
-3.92% med +3.92pp 30 / 30
AW40 38/40 · 95% wt
Agentic Winners 40 (EW)
+3.74% med -2.14pp 27 / 11

S&P 500 sectors

XLK 72/72
Technology Select Sector
-1.55% med -0.39pp 18 / 54
XLF 76/76
Financial Select Sector
+0.38% med -0.25pp 43 / 33
XLV 59/59
Health Care Select Sector
-0.24% med +0.00pp 24 / 35
XLE 21/21
Energy Select Sector
+0.63% med -0.45pp 14 / 7
XLI 80/80
Industrial Select Sector
-0.93% med +0.43pp 25 / 55
XLP 36/36
Consumer Staples Select Sector
+0.43% med +0.01pp 22 / 14
XLY 48/48
Consumer Discretionary Select Sector
+1.15% med -0.47pp 34 / 13
XLU 31/31
Utilities Select Sector
-1.04% med +0.52pp 2 / 29
XLB 26/26
Materials Select Sector
-0.09% med +0.36pp 15 / 11
XLRE 31/31
Real Estate Select Sector
-0.40% med +0.48pp 17 / 14
XLC 23/23
Communication Services Select Sector
+1.42% med -0.22pp 18 / 4

Nasdaq-100 cuts

QTEC 45/45
First Trust Nasdaq-100 Technology
-1.75% med +0.11pp 16 / 29
QQXT 56/56
First Trust Nasdaq-100 Ex-Technology
-0.27% med +0.39pp 29 / 26
QQEW 49/49
First Trust Nasdaq-100 Equal Weight
-0.60% med +0.80pp 25 / 23
QTOP 31/31
iShares Nasdaq-100 Top 30
-0.56% med +0.21pp 14 / 17

Tech & thematics

IGV 110/110
iShares Expanded Tech-Software
-0.74% med +0.22pp 44 / 64
SMH 25/25
VanEck Semiconductor
-3.47% med +0.08pp 0 / 25
XSD 43/43
SPDR S&P Semiconductor (EW)
-3.68% med +0.29pp 2 / 41
AIQ 66/66
Global X AI & Technology
-0.50% med -0.04pp 29 / 37
CIBR 41/41
First Trust Nasdaq Cybersecurity
-2.21% med +0.31pp 12 / 27
DTCR 20/20
Global X Data Center & Digital Infra
-1.75% med -0.83pp 4 / 16
WTAI 47/48 · 77% wt
WisdomTree AI & Innovation
-2.61% med +1.04pp 15 / 31
QTUM 62/63 · 76% wt
Defiance Quantum
-1.81% med -0.72pp 13 / 49
ARKK 42/42
ARK Innovation
-3.19% med +0.26pp 9 / 33

Global

IXN 87/124 · 81% wt
iShares Global Tech
-1.44% med +0.31pp 24 / 63

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 2026-08-28

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 2026-08-28.

Which sector shows the widest breadth divergence today?

As of 2026-08-28, AEI (Agentic Ecosystem Index (EW)) shows the widest gap between its median constituent and the ETF itself: median -9.76pp versus the ETF's +6.81%, with 10 advancers against 24 decliners.

Which sectors are improving or weakening on a 21-day view?

As of 2026-08-28, 1 ETF show improving breadth (advance/decline rising under flat or soft price), led by XLP, and 6 show weakening breadth (advance/decline falling under firm price), led by XLY.

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.