AT+T INC and NEWS CORP CLASS B moved almost identically (+42.32% vs +41.11%), yet T moved the XLC 62.2× as much. In a cap-weighted index, the bigger company's weight turns the same percentage move into far more points.
Attribution map
slicing the +28.90 pt move · cell size = points contributed · color = direction, intensity = return
GOOGL+9.1 pts(+159.8%)
CHTR−8.0 pts(−86.0%)
GOOG+7.0 pts(+157.2%)
META+6.9 pts(+111.3%)
APP+3.5 pts(+270.5%)
CMCSA−3.1 pts(−52.0%)
LYV+2.3 pts
T+2.2 pts
DIS−1.5 pts(−36.7%)
RDDT−1.5 pts
TTWO+1.1 pts
NFLX−1.0 pts
TMUS+0.9 pts
FOXA
TKO+0.7 pts
FOX
SKYD
Concentration curve
cumulative share of the +28.90 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−100%0%+100%+200%
From −85.99% (CHTR) to +270.47% (APP). Equal-weight, the XLC would be +57.29% vs the actual +35.48%; the gap is what cap weighting did.
By sector
point contribution · sums to +28.90 pts
-22
+20.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
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Communication Services · Select Sector
What moved the market
5Y · OCT 9, 2026
+35.48%
+28.9 pts · closed 110.36
16 of 22 rose · 6 fell
GOOGL+159.8%
+9.1
GOOG+157.2%
+7.0
META+111.3%
+6.9
APP+270.5%
+3.5
LYV+72.5%
+2.3
NFLX+14.7%
−1.0
RDDT−20.2%
−1.5
DIS−36.7%
−1.5
CMCSA−52.0%
−3.1
CHTR−86.0%
−8.0
3 stocks drove 80% of the gain: GOOGL, GOOG, METAWMTMT.COM
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