WELLTOWER INC and ALEXANDRIA REAL ESTATE EQUIT moved almost identically (+8.97% vs +8.31%), yet WELL moved the XLRE 10.3× 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 −1.20 pt move · cell size = points contributed · color = direction, intensity = return
WELL+0.6 pts(+9.0%)
DLR−0.3 pts(−4.7%)
EQIX−0.2 pts(+0.1%)
WY−0.2 pts(−21.8%)
PLD−0.2 pts(−5.1%)
VICI−0.2 pts(−17.2%)
SBAC−0.2 pts(−17.9%)
VMRK−0.2 pts(−11.0%)
O−0.2 pts(−13.9%)
CBRE−0.2 pts(−7.4%)
AMT+0.2 pts(+3.7%)
CSGP−0.1 pts(−18.7%)
CCI−0.1 pts
ESS+0.1 pts
DOC+0.1 pts(+12.4%)
HST+0.1 pts(+13.4%)
BXP+0.1 pts
SPG+0.1 pts
ARE+0.1 pts
INVH+0.0 pts
VTR+0.0 pts
EXR
REG
IRM
Concentration curve
cumulative share of the −1.20 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−25%−15%−5%+5%
From −21.80% (WY) to +13.41% (HST). Equal-weight, the XLRE would be −1.41% vs the actual −2.81%; the gap is what cap weighting did.
By sector
point contribution · sums to −1.20 pts
-30
−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
6M · OCT 9, 2026
−2.81%
−1.2 pts · closed 41.62
11 of 30 rose · 19 fell
WELL+9.0%
+0.6
AMT+3.7%
+0.2
ESS+9.6%
+0.1
DOC+12.4%
+0.1
HST+13.4%
+0.1
VICI−17.2%
−0.2
PLD−5.1%
−0.2
WY−21.8%
−0.2
EQIX+0.1%
−0.2
DLR−4.7%
−0.3
3 stocks drove 59% of the decline: DLR, EQIX, WYWMTMT.COM
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