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 Communication Services
3 · Sub-industry
Inside Cable & Satellite
Cable & Satellite · weight
1.07%
Industry change · 12M
+1.07 pp
Cable & Satellite · contribution
+1.070 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2021 · 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 |
|---|---|---|---|---|---|---|---|
| Charter Communications → CHTR | United States | $197.1bn | 0.692% | +0.002 pp | +0.691 pp | +16.5% | Yes |
| Comcast → CMCSA | United States | $108.1bn | 0.380% | -0.010 pp | +0.379 pp | +23.2% | 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.