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 REITs0.74%+0.00 ppOffice REITs0.18%+0.00 ppReal Estate Services0.09%+0.00 ppData Center REITs0.33%+0.00 ppHealth Care REITs0.30%+0.00 ppMulti-Family Residential REITs0.33%+0.00 ppSelf-Storage REITs0.25%+0.00 ppRetail REITs0.50%+0.00 ppHotel & Resort REITs0.09%+0.00 ppOther Specialized REITs0.05%+0.00 ppIndustrial REITs0.20%+0.00 ppTimber REITs0.16%+0.00 ppSingle-Family Residential REITs0.00%+0.00 pp
3 · Sub-industry
Inside Self-Storage REITs
Self-Storage REITs · weight
0.25%
Industry change · 12M
+0.00 pp
Self-Storage REITs · contribution
+0.000 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2018 · 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 | $34.1bn | 0.194% | +0.000 pp | +0.000 pp | +0.0% | No |
| Extra Space Storage → EXR | United States | $10.5bn | 0.060% | +0.000 pp | +0.000 pp | +0.0% | 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.