CHARTER COMMUNICATIONS INC A and REDDIT INC CL A moved almost identically (−26.28% vs −22.46%), yet CHTR moved the XLC 17.4× 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 −5.09 pt move · cell size = points contributed · color = direction, intensity = return
META−3.3 pts(−12.6%)
GOOGL+2.8 pts(+9.4%)
GOOG+2.2 pts(+8.2%)
CHTR−2.0 pts(−26.3%)
NFLX−2.0 pts(−13.1%)
LYV+1.6 pts(+28.2%)
TTD−1.4 pts(−65.7%)
TMUS−1.4 pts(−10.6%)
OMC+1.1 pts(+11.1%)
VZ+1.1 pts(+27.3%)
APP−1.0 pts(−54.3%)
ECHO−0.7 pts(−19.5%)
TTWO−0.4 pts
WBD
PSKY−0.3 pts
CMCSA−0.3 pts
T−0.3 pts
TKO+0.2 pts
DIS
NWSA
Concentration curve
cumulative share of the −5.09 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−75%−50%−25%0%+25%
From −65.67% (TTD) to +28.21% (LYV). Equal-weight, the XLC would be −5.83% vs the actual −4.32%; the gap is what cap weighting did.
By sector
point contribution · sums to −5.09 pts
-24
−4.7
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
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Communication Services · Select Sector
What moved the market
YTD · AUG 26, 2026
−4.32%
−5.1 pts · closed 112.63
9 of 24 rose · 15 fell
GOOGL+9.4%
+2.8
GOOG+8.2%
+2.2
LYV+28.2%
+1.6
OMC+11.1%
+1.1
VZ+27.3%
+1.1
TMUS−10.6%
−1.4
TTD−65.7%
−1.4
NFLX−13.1%
−2.0
CHTR−26.3%
−2.0
META−12.6%
−3.3
3 stocks drove 100%+ of the decline: META, CHTR, NFLXWMTMT.COM
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