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 & Defense5.30%+2.00 ppIndustrial Conglomerates1.41%+0.71 ppIndustrial Machinery & Supplies & Components0.97%+0.40 ppRail Transportation0.96%+0.34 ppConstruction Machinery & Heavy Transportation Equipment0.67%+0.26 ppEnvironmental & Facilities Services0.45%+0.25 ppHuman Resource & Employment Services0.53%+0.24 ppAir Freight & Logistics0.75%+0.23 ppElectrical Components & Equipment0.62%+0.21 ppBuilding Products0.44%+0.20 ppPassenger Airlines0.47%+0.16 ppAgricultural & Farm Machinery0.28%+0.13 ppResearch & Consulting Services0.23%+0.11 ppDiversified Support Services0.13%+0.10 ppTrading Companies & Distributors0.10%+0.04 ppConstruction & Engineering0.08%+0.04 ppData Processing & Outsourced Services0.08%+0.03 ppCargo Ground Transportation0.06%+0.02 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.62%
Industry change · 12M
+0.21 pp
Electrical Components & Equipment · contribution
+0.213 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 |
|---|---|---|---|---|---|---|---|
| Eaton Corporation → ETN | United States | $34.9bn | 0.185% | -0.004 pp | +0.066 pp | -1.6% | No |
| Emerson Electric → EMR | United States | $41.1bn | 0.218% | -0.003 pp | +0.065 pp | -10.0% | Yes |
| Ametek → AME | United States | $21.0bn | 0.111% | -0.000 pp | +0.053 pp | +16.9% | Yes |
| Rockwell Automation → ROK | United States | $19.3bn | 0.102% | -0.002 pp | +0.029 pp | -10.1% | 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.