WELLTOWER INC and ESSEX PROPERTY TRUST INC moved almost identically (+1.08% vs +1.11%), yet WELL moved the XLRE 5.4× 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 +0.77 pt move · cell size = points contributed · color = direction, intensity = return
CCI+0.2 pts(+15.6%)
AMT+0.2 pts(+9.3%)
SBAC+0.1 pts(+7.3%)
WELL+0.1 pts(+1.1%)
EQIX+0.0 pts(+1.5%)
VMRK+0.0 pts(+2.0%)
PSA+0.0 pts(+1.5%)
DLR+0.0 pts(+1.6%)
IRM+0.0 pts
EXR+0.0 pts
ESS
INVH+0.0 pts
UDR+0.0 pts
VTR
REG
CPT
CSGP
FRT
Concentration curve
cumulative share of the +0.77 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−2%+2%+6%+10%+14%
From −0.47% (CSGP) to +15.60% (CCI). Equal-weight, the XLRE would be +1.83% vs the actual +1.87%; the gap is what cap weighting did.
By sector
point contribution · sums to +0.77 pts
-27
+0.8
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
1D · OCT 9, 2026
+1.87%
+0.8 pts · closed 41.62
21 of 27 rose · 6 fell
CCI+15.6%
+0.2
AMT+9.3%
+0.2
SBAC+7.3%
+0.1
WELL+1.1%
+0.1
EQIX+1.5%
+0.0
ARE−0.2%
−0.0
SPG−0.1%
−0.0
WY−0.3%
−0.0
CSGP−0.5%
−0.0
CBRE−0.2%
−0.0
3 stocks drove 62% of the gain: CCI, AMT, SBACWMTMT.COM
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