AMAZON.COM INC and HASBRO INC moved almost identically (+13.69% vs +14.52%), yet AMZN moved the XLY 101.7× 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 −6.55 pt move · cell size = points contributed · color = direction, intensity = return
AMZN+4.8 pts(+13.7%)
TSLA−3.4 pts(−14.9%)
MCD−1.6 pts(−22.1%)
HD−1.4 pts(−14.3%)
LOW−1.3 pts(−22.2%)
NKE−1.0 pts(−44.7%)
BKNG−1.0 pts
TJX−0.7 pts(−9.1%)
CVNA
ABNB+0.5 pts(+22.2%)
ORLY−0.5 pts(−5.2%)
MAR+0.4 pts(+18.4%)
AZO
ROST
LULU−0.4 pts
HLT
EBAY+0.3 pts
TSCO−0.3 pts
LVS
WSM+0.2 pts
GRMN+0.2 pts
CMG
GM
BBY
CCL
LEN
DPZ
WYNN
DHI
DECK
Concentration curve
cumulative share of the −6.55 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 −54.53% (LULU) to +36.31% (WSM). Equal-weight, the XLY would be −6.41% vs the actual −5.49%; the gap is what cap weighting did.
By sector
point contribution · sums to −6.55 pts
-47
−6.7
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
YTD · OCT 9, 2026
−5.49%
−6.5 pts · closed 112.86
16 of 47 rose · 31 fell
AMZN+13.7%
+4.8
ABNB+22.2%
+0.5
MAR+18.4%
+0.4
ROST+24.0%
+0.4
HLT+13.8%
+0.4
NKE−44.7%
−1.0
LOW−22.2%
−1.3
HD−14.3%
−1.4
MCD−22.1%
−1.6
TSLA−14.9%
−3.4
3 stocks drove 97% of the decline: TSLA, MCD, HDWMTMT.COM
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