ABBVIE INC and DAVITA INC moved almost identically (+29.16% vs +26.67%), yet ABBV moved the XLV 76.5× 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 +37.13 pt move · cell size = points contributed · color = direction, intensity = return
LLY+10.9 pts(+74.2%)
JNJ+6.8 pts(+56.1%)
MRK+4.5 pts(+85.1%)
ABBV+2.6 pts(+29.2%)
UNH+2.5 pts(+32.5%)
BSX−2.3 pts(−53.0%)
AMGN+2.1 pts(+53.8%)
TMO+1.4 pts(+26.1%)
BMY+1.3 pts
MRNA+1.2 pts
GILD+1.1 pts
ISRG−1.0 pts(−21.9%)
VRTX+1.0 pts(+39.9%)
ZTS−0.9 pts
CVS+0.8 pts
MCK+0.8 pts
REGN
PFE+0.6 pts
CAH
ELV
CNC
SYK
IQV
BDX
BIIB
WAT
COR
DXCM
WST
EW
CRL
CI
LH
Concentration curve
cumulative share of the +37.13 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 −56.75% (PODD) to +485.66% (MRNA). Equal-weight, the XLV would be +27.11% vs the actual +26.87%; the gap is what cap weighting did.
By sector
point contribution · sums to +37.13 pts
-59
+38.4
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
1Y · AUG 25, 2026
+26.87%
+37.1 pts · closed 175.30
44 of 59 rose · 15 fell
LLY+74.2%
+10.9
JNJ+56.1%
+6.8
MRK+85.1%
+4.5
ABBV+29.2%
+2.6
UNH+32.5%
+2.5
SYK−15.3%
−0.4
ABT−11.0%
−0.4
ZTS−50.1%
−0.9
ISRG−21.9%
−1.0
BSX−53.0%
−2.3
Broad advance · LLY led at +10.87 ptsWMTMT.COM
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