PHILLIPS 66 and EXPAND ENERGY CORP moved almost identically (+2.67% vs +2.48%), yet PSX moved the XLE 4.2× 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 +0.56 pt move · cell size = points contributed · color = direction, intensity = return
WMB+0.1 pts(+4.3%)
PSX+0.1 pts(+2.7%)
KMI+0.1 pts(+3.7%)
XOM−0.1 pts(−0.6%)
MPC+0.1 pts(+2.2%)
VLO+0.1 pts(+2.3%)
OKE+0.1 pts(+3.1%)
TRGP+0.1 pts(+2.4%)
CVX+0.0 pts(+0.5%)
EQT+0.0 pts(+2.2%)
EOG−0.0 pts(−0.9%)
EXE+0.0 pts
BKR
OXY
DVN
FANG
Concentration curve
cumulative share of the +0.56 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−1%0%+1%+2%+3%+4%
From −0.87% (EOG) to +4.33% (WMB). Equal-weight, the XLE would be +1.28% vs the actual +0.90%; the gap is what cap weighting did.
By sector
point contribution · sums to +0.56 pts
-21
+0.6
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
1D LIVE · AUG 26, 2026
+0.90%
+0.6 pts · now 62.63
19 of 21 rose · 2 fell
WMB+4.3%
+0.1
PSX+2.7%
+0.1
KMI+3.7%
+0.1
MPC+2.2%
+0.1
VLO+2.3%
+0.1
EOG−0.9%
−0.0
XOM−0.6%
−0.1
Broad advance · WMB led at +0.10 ptsWMTMT.COM
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