AMAZON.COM INC and ULTA BEAUTY INC moved almost identically (+10.09% vs +9.61%), yet AMZN moved the XLY 158.8× 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 −0.03 pt move · cell size = points contributed · color = direction, intensity = return
AMZN+3.6 pts(+10.1%)
TSLA+2.7 pts(+9.7%)
MCD−1.6 pts(−22.5%)
LOW−1.2 pts(−23.5%)
HD−1.2 pts(−13.2%)
TJX−0.9 pts(−13.8%)
DASH+0.7 pts(+28.8%)
ABNB+0.6 pts(+28.6%)
SBUX−0.5 pts(−5.5%)
ORLY−0.4 pts
AZO−0.4 pts
LULU−0.2 pts
NKE−0.2 pts
CVNA
EBAY
GM
TPR
BBY
WSM
EXPE+0.2 pts
LVS−0.1 pts
DHI
DECK
APTV
BKNG
NVR
CCL
Concentration curve
cumulative share of the −0.03 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−50%−25%0%+25%
From −42.33% (LULU) to +41.30% (BBY). Equal-weight, the XLY would be −3.67% vs the actual −0.03%; the gap is what cap weighting did.
By sector
point contribution · sums to −0.03 pts
-47
+0.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
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Consumer Discretionary · Select Sector
What moved the market
6M · OCT 9, 2026
−0.03%
−0.0 pts · closed 112.86
19 of 47 rose · 28 fell
AMZN+10.1%
+3.6
TSLA+9.7%
+2.7
DASH+28.8%
+0.7
ABNB+28.6%
+0.6
EBAY+17.9%
+0.2
SBUX−5.5%
−0.5
TJX−13.8%
−0.9
HD−13.2%
−1.2
LOW−23.5%
−1.2
MCD−22.5%
−1.6
Dead flat · MCD and AMZN cancelled outWMTMT.COM
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