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
Telecom Tower REITs0.41%+0.41 ppData Center REITs0.20%+0.20 ppRetail REITs0.16%+0.16 ppIndustrial REITs0.15%+0.15 ppMulti-Family Residential REITs0.14%+0.14 ppHealth Care REITs0.13%+0.13 ppSelf-Storage REITs0.12%+0.12 ppOffice REITs0.07%+0.07 ppTimber REITs0.05%+0.05 ppReal Estate Services0.05%+0.05 ppHotel & Resort REITs0.02%+0.02 ppOther Specialized REITs0.02%+0.02 ppSingle-Family Residential REITs0.00%+0.00 pp
3 · Sub-industry
Inside Health Care REITs
Health Care REITs · weight
0.13%
Industry change · 12M
+0.13 pp
Health Care REITs · contribution
+0.131 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2021 · 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 |
|---|---|---|---|---|---|---|---|
| Welltower → WELL | United States | $29.9bn | 0.058% | -0.051 pp | +0.058 pp | +63.8% | No |
| Ventas → VTR | United States | $20.0bn | 0.039% | -0.035 pp | +0.039 pp | +107.3% | No |
| Healthpeak Properties → DOC | United States | $17.1bn | 0.033% | -0.032 pp | +0.033 pp | +40.1% | No |
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.