VISA INC CLASS A SHARES and FACTSET RESEARCH SYSTEMS INC moved almost identically (+7.94% vs +9.10%), yet V moved the XLF 29.8× 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 −1.34 pt move · cell size = points contributed · color = direction, intensity = return
GS−0.4 pts(−14.4%)
BRK-B+0.3 pts(+3.7%)
V+0.3 pts(+7.9%)
MA+0.3 pts(+9.6%)
MS−0.3 pts(−13.6%)
BAC−0.2 pts(−8.7%)
AXP−0.2 pts(−13.1%)
AON−0.1 pts
C−0.1 pts(−7.4%)
CME+0.1 pts
PNC−0.1 pts
ICE+0.1 pts(+13.4%)
PGR−0.1 pts(−7.3%)
USB−0.1 pts
SPGI−0.1 pts
WFC−0.1 pts
TFC−0.0 pts
ALL
FITB
JPM
BX
AJG
PYPL
BLK
CB
TRV
MSCI
KKR
HOOD
AFL
MTB
HIG
COIN
KEY
IBKR
CFG
CPAY
FISV
CBOE
NTRS
AIG
Concentration curve
cumulative share of the −1.34 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−30%−20%−10%0%+10%
From −25.39% (AON) to +16.54% (PYPL). Equal-weight, the XLF would be −3.28% vs the actual −2.39%; the gap is what cap weighting did.
By sector
point contribution · sums to −1.34 pts
-76
−1.3
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
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Financials · Select Sector
What moved the market
3M · OCT 9, 2026
−2.39%
−1.3 pts · closed 54.73
18 of 76 rose · 58 fell
BRK-B+3.7%
+0.3
V+7.9%
+0.3
MA+9.6%
+0.3
CME+14.5%
+0.1
ICE+13.4%
+0.1
AON−25.4%
−0.1
AXP−13.1%
−0.2
BAC−8.7%
−0.2
MS−13.6%
−0.3
GS−14.4%
−0.4
3 stocks drove 63% of the decline: GS, MS, BACWMTMT.COM
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