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 REITs0.92%+0.14 ppTimber REITs0.11%-0.06 ppIndustrial REITs0.27%+0.06 ppHealth Care REITs0.39%+0.05 ppRetail REITs0.51%-0.04 ppMulti-Family Residential REITs0.40%+0.03 ppHotel & Resort REITs0.07%-0.02 ppSelf-Storage REITs0.30%-0.02 ppData Center REITs0.36%+0.01 ppOther Specialized REITs0.05%-0.01 ppReal Estate Services0.09%-0.01 ppOffice REITs0.19%-0.00 ppSingle-Family Residential REITs0.00%+0.00 pp
3 · Sub-industry
Inside Self-Storage REITs
Self-Storage REITs · weight
0.30%
Industry change · 12M
-0.02 pp
Self-Storage REITs · contribution
-0.019 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2019 · 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 | $41.6bn | 0.224% | +0.006 pp | -0.016 pp | +8.9% | Yes |
| Extra Space Storage → EXR | United States | $13.5bn | 0.073% | -0.002 pp | -0.003 pp | +10.1% | 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.