EXXONMOBIL HOLDINGS CORP and OCCIDENTAL PETROLEUM CORP moved almost identically (+17.48% vs +20.26%), yet XOM moved the XLE 7.8× 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 +8.96 pt move · cell size = points contributed · color = direction, intensity = return
XOM+1.8 pts(+17.5%)
CVX+1.7 pts(+20.6%)
PSX+1.1 pts(+40.1%)
MPC+1.1 pts(+38.8%)
VLO+0.9 pts(+31.2%)
COP+0.7 pts(+26.8%)
SLB+0.4 pts(+14.6%)
EOG+0.3 pts(+14.0%)
OXY+0.2 pts(+20.3%)
BKR+0.2 pts(+11.4%)
DVN+0.2 pts(+13.6%)
FANG+0.2 pts(+13.7%)
WMB−0.1 pts
OKE+0.1 pts
TRGP+0.1 pts
APA+0.1 pts
TPL
Concentration curve
cumulative share of the +8.96 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−20%0%+20%+40%
From −14.88% (TPL) to +40.06% (PSX). Equal-weight, the XLE would be +13.43% vs the actual +16.87%; the gap is what cap weighting did.
By sector
point contribution · sums to +8.96 pts
-21
+9.0
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
Share this move
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Energy · Select Sector
What moved the market
QTD · AUG 25, 2026
+16.87%
+9.0 pts · closed 62.07
17 of 21 rose · 4 fell
XOM+17.5%
+1.8
CVX+20.6%
+1.7
PSX+40.1%
+1.1
MPC+38.8%
+1.1
VLO+31.2%
+0.9
KMI−2.3%
−0.0
HAL−0.4%
−0.0
TPL−14.9%
−0.1
WMB−4.4%
−0.1
Broad advance · XOM led at +1.77 ptsWMTMT.COM
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