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 REITs0.68%-0.17 ppHotel & Resort REITs0.15%+0.11 ppReal Estate Services0.20%+0.08 ppData Center REITs0.32%-0.08 ppSingle-Family Residential REITs0.07%+0.07 ppSelf-Storage REITs0.25%-0.06 ppOffice REITs0.12%-0.04 ppMulti-Family Residential REITs0.28%-0.04 ppIndustrial REITs0.38%-0.02 ppHealth Care REITs0.23%-0.02 ppRetail REITs0.38%+0.02 ppTimber REITs0.08%-0.02 ppOther Specialized REITs0.05%+0.00 pp
3 · Sub-industry
Inside Telecom Tower REITs
Telecom Tower REITs · weight
0.68%
Industry change · 12M
-0.17 pp
Telecom Tower REITs · contribution
-0.174 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2022 · 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 |
|---|---|---|---|---|---|---|---|
| Crown Castle → CCI | United States | $58.7bn | 0.212% | -0.034 pp | -0.077 pp | -32.6% | No |
| American Tower → AMT | United States | $98.6bn | 0.356% | -0.037 pp | -0.071 pp | -25.7% | No |
| SBA Communications → SBAC | United States | $30.3bn | 0.109% | -0.011 pp | -0.026 pp | -27.3% | 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.