JOHNSON + JOHNSON and INCYTE CORP moved almost identically (+75.14% vs +71.45%), yet JNJ moved the XLV 131.9× 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 +38.49 pt move · cell size = points contributed · color = direction, intensity = return
LLY+23.8 pts(+372.6%)
ABBV+7.6 pts(+165.1%)
JNJ+7.0 pts(+75.1%)
MRK+3.9 pts(+131.9%)
MRNA−3.3 pts(−60.5%)
AMGN+2.7 pts(+122.2%)
GILD+2.6 pts(+144.3%)
MCK+2.5 pts(+357.9%)
PFE−2.3 pts(−27.4%)
DHR−1.9 pts
VRTX+1.9 pts
ZTS−1.7 pts(−60.7%)
COR+1.3 pts
CAH+1.2 pts
ALGN
SYK+1.0 pts
CVS+0.9 pts
BMY+0.8 pts
BAX−0.7 pts
CI
BIIB
ABT
VEEV
HCA
IDXX
RVTY
MTD
ELV
A
REGN
CNC
COO
Concentration curve
cumulative share of the +38.49 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−100%0%+100%+200%+300%+400%
From −76.56% (ALGN) to +404.48% (CAH). Equal-weight, the XLV would be +37.22% vs the actual +28.13%; the gap is what cap weighting did.
By sector
point contribution · sums to +38.49 pts
-59
+41.4
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
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Health Care · Select Sector
What moved the market
5Y · AUG 25, 2026
+28.13%
+38.5 pts · closed 175.30
35 of 59 rose · 24 fell
LLY+372.6%
+23.8
ABBV+165.1%
+7.6
JNJ+75.1%
+7.0
MRK+131.9%
+3.9
AMGN+122.2%
+2.7
ALGN−76.6%
−1.2
ZTS−60.7%
−1.7
DHR−22.0%
−1.9
PFE−27.4%
−2.3
MRNA−60.5%
−3.3
3 stocks drove 100% of the gain: LLY, ABBV, JNJWMTMT.COM
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