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 Industrials
Aerospace & Defense5.22%+2.47 ppIndustrial Conglomerates1.32%+0.65 ppIndustrial Machinery & Supplies & Components1.00%+0.48 ppRail Transportation0.96%+0.38 ppConstruction Machinery & Heavy Transportation Equipment0.70%+0.31 ppElectrical Components & Equipment0.65%+0.29 ppAir Freight & Logistics0.68%+0.23 ppHuman Resource & Employment Services0.51%+0.22 ppBuilding Products0.42%+0.19 ppEnvironmental & Facilities Services0.41%+0.17 ppPassenger Airlines0.43%+0.14 ppDiversified Support Services0.13%+0.10 ppResearch & Consulting Services0.20%+0.10 ppAgricultural & Farm Machinery0.27%+0.10 ppTrading Companies & Distributors0.11%+0.07 ppCargo Ground Transportation0.09%+0.05 ppConstruction & Engineering0.08%+0.04 ppData Processing & Outsourced Services0.07%+0.03 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.65%
Industry change · 12M
+0.29 pp
Electrical Components & Equipment · contribution
+0.286 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 |
|---|---|---|---|---|---|---|---|
| Emerson Electric → EMR | United States | $46.5bn | 0.228% | +0.009 pp | +0.094 pp | +31.5% | Yes |
| Eaton Corporation → ETN | United States | $39.2bn | 0.192% | +0.007 pp | +0.086 pp | +42.8% | Yes |
| Ametek → AME | United States | $22.8bn | 0.112% | +0.000 pp | +0.056 pp | +48.3% | Yes |
| Rockwell Automation → ROK | United States | $23.4bn | 0.115% | +0.012 pp | +0.050 pp | +37.8% | 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.