AMAZON.COM INC and DECKERS OUTDOOR CORP moved almost identically (−2.09% vs −2.37%), yet AMZN moved the XLY 58.0× 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 −1.42 pt move · cell size = points contributed · color = direction, intensity = return
AMZN−0.6 pts(−2.1%)
TSLA−0.3 pts(−1.5%)
TJX−0.2 pts(−5.3%)
DASH+0.2 pts(+7.6%)
HD−0.2 pts(−2.8%)
LOW−0.2 pts(−4.4%)
SBUX+0.1 pts
CMG+0.1 pts(+7.7%)
NKE−0.1 pts
BKNG−0.1 pts
CVNA+0.1 pts(+5.0%)
F−0.1 pts(−4.2%)
YUM+0.1 pts(+5.8%)
RCL−0.1 pts
CCL−0.0 pts
ORLY−0.0 pts
AZO
GRMN−0.0 pts
GM+0.0 pts
EXPE
ABNB
EBAY
DHI
RL
WSM
ROST
MCD
HLT
HAS
Concentration curve
cumulative share of the −1.42 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−6%−2%+2%+6%
From −5.98% (NKE) to +7.75% (CMG). Equal-weight, the XLY would be −0.50% vs the actual −1.20%; the gap is what cap weighting did.
By sector
point contribution · sums to −1.42 pts
-47
−1.4
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
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Consumer Discretionary · Select Sector
What moved the market
1W · AUG 26, 2026
−1.20%
−1.4 pts · closed 117.17
15 of 47 rose · 32 fell
DASH+7.6%
+0.2
SBUX+3.3%
+0.1
CMG+7.7%
+0.1
CVNA+5.0%
+0.1
YUM+5.8%
+0.1
LOW−4.4%
−0.2
HD−2.8%
−0.2
TJX−5.3%
−0.2
TSLA−1.5%
−0.3
AMZN−2.1%
−0.6
3 stocks drove 82% of the decline: AMZN, TSLA, TJXWMTMT.COM
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