ALPHABET INC CL A and TRADE DESK INC/THE CLASS A moved almost identically (−1.60% vs −1.85%), yet GOOGL moved the XLC 8.8× 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 −0.48 pt move · cell size = points contributed · color = direction, intensity = return
META+0.3 pts(+1.5%)
GOOGL−0.2 pts(−1.6%)
GOOG−0.1 pts(−1.5%)
LYV−0.1 pts(−1.5%)
DIS−0.1 pts(−1.3%)
TKO−0.0 pts(−1.6%)
ECHO−0.0 pts(−1.7%)
TTWO+0.0 pts(+0.8%)
TMUS−0.0 pts(−0.7%)
CHTR−0.0 pts
OMC−0.0 pts
FOXA−0.0 pts(−1.0%)
NFLX−0.0 pts
T+0.0 pts
TTD−0.0 pts
WBD−0.0 pts
FOX
CMCSA
RDDT−0.0 pts
APP
Concentration curve
cumulative share of the −0.48 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−4%−3%−2%−1%0%+1%
From −3.76% (RDDT) to +1.53% (META). Equal-weight, the XLC would be −0.78% vs the actual −0.42%; the gap is what cap weighting did.
By sector
point contribution · sums to −0.48 pts
-24
−0.5
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
Share this move
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Communication Services · Select Sector
What moved the market
1D LIVE · AUG 26, 2026
−0.42%
−0.5 pts · now 112.69
3 of 24 rose · 21 fell
META+1.5%
+0.3
TTWO+0.8%
+0.0
T+0.4%
+0.0
TKO−1.6%
−0.0
DIS−1.3%
−0.1
LYV−1.5%
−0.1
GOOG−1.5%
−0.1
GOOGL−1.6%
−0.2
3 stocks drove 85% of the decline: GOOGL, GOOG, LYVWMTMT.COM
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