AMERICAN TOWER CORP and HEALTHPEAK PROPERTIES INC moved almost identically (+28.39% vs +26.73%), yet AMT moved the XLRE 8.8× 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 +8.43 pt move · cell size = points contributed · color = direction, intensity = return
WELL+3.2 pts(+191.7%)
EQIX+1.4 pts(+51.9%)
SPG+1.1 pts(+118.8%)
VTR+1.1 pts(+119.4%)
CSGP−1.1 pts(−61.2%)
IRM+1.0 pts(+116.6%)
AMT+0.8 pts(+28.4%)
CBRE+0.6 pts(+83.8%)
DLR+0.6 pts(+65.3%)
O+0.6 pts(+27.3%)
EXR+0.5 pts(+30.4%)
PSA+0.4 pts(+25.0%)
PLD+0.4 pts
ARE−0.4 pts
WY−0.3 pts
KIM+0.3 pts
ESS+0.3 pts
HST+0.3 pts
REG
VMRK
VICI
SBAC
FRT
CPT
MAA
Concentration curve
cumulative share of the +8.43 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−100%−50%0%+50%+100%+150%
From −61.18% (CSGP) to +191.65% (WELL). Equal-weight, the XLRE would be +33.68% vs the actual +25.38%; the gap is what cap weighting did.
By sector
point contribution · sums to +8.43 pts
-30
+11.2
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
Share this move
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Real Estate · Select Sector
What moved the market
3Y · OCT 9, 2026
+25.38%
+8.4 pts · closed 41.62
24 of 30 rose · 6 fell
WELL+191.7%
+3.2
EQIX+51.9%
+1.4
SPG+118.8%
+1.1
VTR+119.4%
+1.1
IRM+116.6%
+1.0
VICI−5.4%
−0.1
VMRK−11.0%
−0.2
WY−30.5%
−0.3
ARE−46.1%
−0.4
CSGP−61.2%
−1.1
3 stocks drove 68% of the gain: WELL, EQIX, SPGWMTMT.COM
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