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
Industrial REITs0.29%-0.08 ppTelecom Tower REITs0.43%-0.06 ppData Center REITs0.31%-0.05 ppHealth Care REITs0.28%+0.05 ppMulti-Family Residential REITs0.23%-0.03 ppReal Estate Services0.16%-0.03 ppTimber REITs0.05%-0.02 ppOther Specialized REITs0.08%+0.02 ppHotel & Resort REITs0.11%-0.02 ppOffice REITs0.08%-0.02 ppRetail REITs0.34%+0.01 ppSingle-Family Residential REITs0.05%-0.01 ppSelf-Storage REITs0.24%-0.01 pp
3 · Sub-industry
Inside Self-Storage REITs
Self-Storage REITs · weight
0.24%
Industry change · 12M
-0.01 pp
Self-Storage REITs · contribution
-0.006 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2024 · 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 | $60.2bn | 0.145% | +0.053 pp | -0.010 pp | +29.8% | Yes |
| Extra Space Storage → EXR | United States | $37.5bn | 0.091% | +0.032 pp | +0.004 pp | +42.8% | 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.