CHEVRON CORP and HALLIBURTON CO moved almost identically (+6.13% vs +5.23%), yet CVX moved the XLE 24.0× 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 +3.71 pt move · cell size = points contributed · color = direction, intensity = return
CVX+0.6 pts(+6.1%)
PSX+0.6 pts(+14.5%)
MPC+0.6 pts(+13.9%)
VLO+0.5 pts(+12.1%)
XOM+0.4 pts(+4.4%)
COP+0.3 pts(+14.8%)
TRGP+0.1 pts
DVN+0.1 pts(+8.7%)
APA+0.1 pts(+19.0%)
OKE+0.1 pts(+3.7%)
EOG
SLB
EQT
OXY+0.0 pts
WMB−0.0 pts
FANG
EXE
HAL
Concentration curve
cumulative share of the +3.71 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−10%−5%0%+5%+10%+15%
From −6.08% (TPL) to +19.03% (APA). Equal-weight, the XLE would be +6.37% vs the actual +6.36%; the gap is what cap weighting did.
By sector
point contribution · sums to +3.71 pts
-21
+3.7
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
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Energy · Select Sector
What moved the market
1M · AUG 25, 2026
+6.36%
+3.7 pts · closed 62.07
19 of 21 rose · 2 fell
CVX+6.1%
+0.6
PSX+14.5%
+0.6
MPC+13.9%
+0.6
VLO+12.1%
+0.5
XOM+4.4%
+0.4
TPL−6.1%
−0.0
WMB+0.4%
−0.0
Broad advance · CVX led at +0.63 ptsWMTMT.COM
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