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 & Defense3.30%-3.78 ppIndustrial Conglomerates0.70%-0.67 ppIndustrial Machinery & Supplies & Components0.57%-0.51 ppAir Freight & Logistics0.51%-0.47 ppConstruction Machinery & Heavy Transportation Equipment0.42%-0.41 ppRail Transportation0.61%-0.33 ppElectrical Components & Equipment0.41%-0.31 ppPassenger Airlines0.32%-0.23 ppBuilding Products0.24%-0.23 ppHuman Resource & Employment Services0.29%-0.16 ppAgricultural & Farm Machinery0.15%-0.15 ppEnvironmental & Facilities Services0.20%-0.15 ppResearch & Consulting Services0.11%-0.07 ppTrading Companies & Distributors0.06%-0.05 ppData Processing & Outsourced Services0.05%+0.05 ppCargo Ground Transportation0.04%-0.03 ppConstruction & Engineering0.04%-0.03 ppDiversified Support Services0.03%+0.00 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.41%
Industry change · 12M
-0.31 pp
Electrical Components & Equipment · contribution
-0.315 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2018 · 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 | $48.1bn | 0.153% | -0.111 pp | -0.111 pp | +8.2% | No |
| Eaton Corporation → ETN | United States | $37.6bn | 0.120% | -0.079 pp | -0.091 pp | +5.1% | No |
| Rockwell Automation → ROK | United States | $23.1bn | 0.074% | -0.053 pp | -0.070 pp | -3.5% | No |
| Ametek → AME | United States | $18.3bn | 0.058% | -0.043 pp | -0.042 pp | +4.3% | 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.