JOHNSON + JOHNSON and DAVITA INC moved almost identically (+82.16% vs +92.41%), yet JNJ moved the XLV 119.4× 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 +42.86 pt move · cell size = points contributed · color = direction, intensity = return
LLY+16.1 pts(+126.1%)
JNJ+7.7 pts(+82.2%)
ABBV+6.1 pts(+106.3%)
UNH−4.3 pts(−21.4%)
GILD+2.7 pts
AMGN+2.1 pts(+70.0%)
MCK+1.7 pts(+115.0%)
MRK+1.7 pts(+55.3%)
ISRG+1.4 pts(+46.1%)
TMO+1.4 pts(+32.1%)
ZTS−1.1 pts(−54.8%)
CVS+1.0 pts(+39.1%)
BMY+1.0 pts(+20.0%)
CAH+1.0 pts
COR+0.9 pts
MDT
MRNA+0.8 pts
VRTX+0.8 pts
ABT
ELV
RMD
VEEV
DGX
REGN
VTRS
IQV
HUM
IDXX
Concentration curve
cumulative share of the +42.86 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−100%−50%0%+50%+100%+150%
From −54.76% (ZTS) to +178.22% (CAH). Equal-weight, the XLV would be +47.39% vs the actual +33.49%; the gap is what cap weighting did.
By sector
point contribution · sums to +42.86 pts
-60
+46.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
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Health Care · Select Sector
What moved the market
3Y · OCT 9, 2026
+33.49%
+42.9 pts · closed 170.82
42 of 60 rose · 18 fell
LLY+126.1%
+16.1
JNJ+82.2%
+7.7
ABBV+106.3%
+6.1
GILD+121.0%
+2.7
AMGN+70.0%
+2.1
CNC−5.2%
−0.3
REGN−7.7%
−0.3
ELV−1.3%
−0.5
ZTS−54.8%
−1.1
UNH−21.4%
−4.3
3 stocks drove 70% of the gain: LLY, JNJ, ABBVWMTMT.COM
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