CATERPILLAR INC and GENERAC HOLDINGS INC moved almost identically (+42.17% vs +47.95%), yet CAT moved the XLI 35.8× 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 +23.28 pt move · cell size = points contributed · color = direction, intensity = return
CAT+3.3 pts(+42.2%)
GEV+1.9 pts(+41.9%)
DE+1.7 pts(+36.2%)
FDX+1.7 pts(+78.7%)
UNP+1.3 pts(+35.3%)
ETN+1.2 pts(+29.3%)
GE+1.0 pts(+13.6%)
CSX+0.9 pts(+43.0%)
VRT+0.9 pts(+57.8%)
RTX
URI+0.7 pts(+30.5%)
HONA−0.6 pts(−27.2%)
JCI+0.6 pts
HWM+0.6 pts
PWR+0.6 pts
TT
GWW+0.5 pts(+29.5%)
PH+0.5 pts(+16.1%)
ADP+0.5 pts
FAST+0.5 pts
EMR
FIX
WAB+0.4 pts
CMI+0.4 pts
BA
TDG
NSC+0.4 pts
ODFL+0.4 pts
ITW
LMT
PCAR
GD+0.3 pts
UPS+0.3 pts
ROL
PAYX
NOC
PNR
AME
OTIS
EXPD
CTAS
JBHT
ROK
WM
IEX
EME
VRSK
SWK
BR
RSG
MAS
Concentration curve
cumulative share of the +23.28 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−50%−25%0%+25%+50%+75%
From −39.69% (PNR) to +78.69% (FDX). Equal-weight, the XLI would be +13.47% vs the actual +15.01%; the gap is what cap weighting did.
By sector
point contribution · sums to +23.28 pts
-83
+23.2
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUG
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Industrials · Select Sector
What moved the market
YTD · AUG 25, 2026
+15.01%
+23.3 pts · closed 178.40
57 of 83 rose · 26 fell
CAT+42.2%
+3.3
GEV+41.9%
+1.9
DE+36.2%
+1.7
FDX+78.7%
+1.7
UNP+35.3%
+1.3
ROL−39.0%
−0.2
LHX−10.0%
−0.2
TDG−10.3%
−0.4
BA−2.8%
−0.4
HONA−27.2%
−0.6
Mixed tape · top 3 drove 30% of the gainWMTMT.COM
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