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 REITs0.38%-0.49 ppMulti-Family Residential REITs0.19%-0.17 ppRetail REITs0.24%-0.14 ppSelf-Storage REITs0.17%-0.14 ppData Center REITs0.25%-0.13 ppHealth Care REITs0.16%-0.12 ppOffice REITs0.07%-0.08 ppIndustrial REITs0.26%-0.08 ppHotel & Resort REITs0.10%-0.05 ppSingle-Family Residential REITs0.05%+0.05 ppReal Estate Services0.14%+0.05 ppTimber REITs0.06%-0.04 ppOther Specialized REITs0.04%-0.02 pp
3 · Sub-industry
Inside Self-Storage REITs
Self-Storage REITs · weight
0.17%
Industry change · 12M
-0.14 pp
Self-Storage REITs · contribution
-0.137 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 |
|---|---|---|---|---|---|---|---|
| Public Storage → PSA | United States | $51.3bn | 0.119% | -0.063 pp | -0.095 pp | +0.4% | No |
| Extra Space Storage → EXR | United States | $20.1bn | 0.046% | -0.029 pp | -0.042 pp | -9.0% | 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.