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 REITs0.46%-0.30 ppMulti-Family Residential REITs0.24%-0.09 ppSelf-Storage REITs0.24%-0.05 ppIndustrial REITs0.35%+0.05 ppOffice REITs0.09%-0.05 ppRetail REITs0.32%-0.04 ppData Center REITs0.35%+0.03 ppHotel & Resort REITs0.14%-0.02 ppSingle-Family Residential REITs0.06%-0.02 ppReal Estate Services0.18%-0.01 ppTimber REITs0.07%-0.01 ppOther Specialized REITs0.06%+0.01 ppHealth Care REITs0.23%+0.00 pp
3 · Sub-industry
Inside Health Care REITs
Health Care REITs · weight
0.23%
Industry change · 12M
+0.00 pp
Health Care REITs · contribution
+0.003 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2023 · 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 | $42.5bn | 0.142% | +0.049 pp | +0.025 pp | +31.5% | Yes |
| Healthpeak Properties → DOC | United States | $10.0bn | 0.034% | +0.008 pp | -0.015 pp | -15.6% | Yes |
| Ventas → VTR | United States | $17.0bn | 0.057% | +0.013 pp | -0.006 pp | +9.2% | 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.