EQUINIX INC and DIGITAL REALTY TRUST INC moved almost identically (+21.50% vs +19.73%), yet EQIX moved the XLRE 6.5× 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 −1.91 pt move · cell size = points contributed · color = direction, intensity = return
WELL+2.3 pts(+84.9%)
CSGP−1.0 pts(−60.0%)
EQIX+0.8 pts(+21.5%)
VTR+0.5 pts
ARE−0.5 pts(−56.0%)
SPG+0.5 pts(+27.8%)
WY−0.5 pts
CCI−0.5 pts(−21.9%)
CBRE−0.4 pts(+8.3%)
VICI−0.4 pts(−21.7%)
PSA−0.3 pts(−9.9%)
PLD+0.2 pts
VMRK
UDR−0.2 pts
SBAC−0.2 pts
MAA−0.1 pts
HST+0.1 pts
EXR
BXP−0.1 pts
DLR+0.1 pts
INVH
O
KIM
DOC−0.1 pts
CPT−0.1 pts
REG+0.1 pts
AMT
Concentration curve
cumulative share of the −1.91 pt move · sorted by contribution
When they drove it
cumulative points through the period
Breadth
member returns, this period
−75%−25%+25%+75%
From −59.96% (CSGP) to +84.89% (WELL). Equal-weight, the XLRE would be −3.14% vs the actual −4.38%; the gap is what cap weighting did.
By sector
point contribution · sums to −1.91 pts
-30
+0.1
The year, session by session
every trading day of 2026 · hover for the move
JANFEBMARAPRMAYJUNJULAUGSEPOCT
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Real Estate · Select Sector
What moved the market
2Y · OCT 9, 2026
−4.38%
−1.9 pts · closed 41.62
12 of 30 rose · 18 fell
WELL+84.9%
+2.3
EQIX+21.5%
+0.8
VTR+37.6%
+0.5
SPG+27.8%
+0.5
PLD+12.1%
+0.2
CBRE+8.3%
−0.4
CCI−21.9%
−0.5
WY−38.6%
−0.5
ARE−56.0%
−0.5
CSGP−60.0%
−1.0
3 stocks drove 100%+ of the decline: CSGP, ARE, WYWMTMT.COM
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