AMAZON.COM INC and RALPH LAUREN CORP moved almost identically (+5.33% vs +4.53%), yet AMZN moved the XLY 58.3× 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 +4.02 pt move · cell size = points contributed · color = direction, intensity = return
TSLA+1.5 pts(+7.9%)
AMZN+1.3 pts(+5.3%)
TJX+0.2 pts(+4.9%)
GM+0.2 pts(+7.5%)
DASH+0.1 pts
RCL+0.1 pts(+6.2%)
HD+0.1 pts
SBUX−0.1 pts
ROST−0.1 pts
MCD+0.1 pts
GRMN−0.1 pts(−6.4%)
EBAY+0.1 pts
CCL+0.1 pts
ABNB
YUM
BKNG
MAR
AZO+0.1 pts
HLT+0.1 pts
TSCO
EXPE
CVNA
NKE
LEN
LOW
HAS
ORLY
PHM
Concentration curve
cumulative share of the +4.02 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−8%−4%0%+4%
From −6.43% (GRMN) to +7.86% (TSLA). Equal-weight, the XLY would be +1.74% vs the actual +3.69%; the gap is what cap weighting did.
By sector
point contribution · sums to +4.02 pts
-47
+4.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
Share this move
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Consumer Discretionary · Select Sector
What moved the market
QTD · OCT 9, 2026
+3.69%
+4.0 pts · closed 112.86
32 of 47 rose · 15 fell
TSLA+7.9%
+1.5
AMZN+5.3%
+1.3
TJX+4.9%
+0.2
GM+7.5%
+0.2
DASH+7.1%
+0.1
NKE−1.9%
−0.0
BKNG−1.6%
−0.1
GRMN−6.4%
−0.1
ROST−4.7%
−0.1
SBUX−3.4%
−0.1
3 stocks drove 75% of the gain: TSLA, AMZN, TJXWMTMT.COM
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