PHILLIPS 66 and EXPAND ENERGY CORP moved almost identically (+2.91% vs +2.49%), yet PSX moved the XLE 4.6× 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 +0.63 pt move · cell size = points contributed · color = direction, intensity = return
WMB+0.1 pts(+4.3%)
PSX+0.1 pts(+2.9%)
MPC+0.1 pts(+2.6%)
VLO+0.1 pts(+2.7%)
KMI+0.1 pts(+3.7%)
XOM−0.1 pts(−0.5%)
OKE+0.1 pts(+3.0%)
TRGP+0.1 pts(+2.3%)
CVX+0.1 pts(+0.6%)
EQT+0.0 pts(+2.5%)
EXE+0.0 pts(+2.5%)
EOG−0.0 pts(−0.7%)
DVN
OXY
BKR
COP
Concentration curve
cumulative share of the +0.63 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 −0.74% (EOG) to +4.35% (WMB). Equal-weight, the XLE would be +1.38% vs the actual +1.01%; the gap is what cap weighting did.
By sector
point contribution · sums to +0.63 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
+1.01%
+0.6 pts · now 62.70
19 of 21 rose · 2 fell
WMB+4.3%
+0.1
PSX+2.9%
+0.1
MPC+2.6%
+0.1
VLO+2.7%
+0.1
KMI+3.7%
+0.1
EOG−0.7%
−0.0
XOM−0.5%
−0.1
Broad advance · WMB led at +0.10 ptsWMTMT.COM
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