Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Real Estate
Hotel & Resort REITs0.16%+0.11 ppMulti-Family Residential REITs0.36%+0.07 ppRetail REITs0.38%+0.06 ppSelf-Storage REITs0.30%+0.04 ppData Center REITs0.38%-0.03 ppIndustrial REITs0.34%+0.03 ppTelecom Tower REITs0.87%+0.03 ppHealth Care REITs0.28%+0.02 ppOther Specialized REITs0.06%+0.01 ppOffice REITs0.15%-0.01 ppReal Estate Services0.09%-0.01 ppTimber REITs0.10%+0.00 ppSingle-Family Residential REITs0.00%+0.00 pp
3 · Sub-industry
Inside Data Center REITs
Data Center REITs · weight
0.38%
Industry change · 12M
-0.03 pp
Data Center REITs · contribution
-0.027 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2022 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Equinix → EQIX | United States | $59.8bn | 0.233% | +0.006 pp | -0.021 pp | -16.8% | Yes |
| Digital Realty → DLR | United States | $37.0bn | 0.144% | +0.008 pp | -0.006 pp | -10.8% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.