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 & Defense3.45%-3.63 ppIndustrial Conglomerates0.70%-0.67 ppIndustrial Machinery & Supplies & Components0.56%-0.52 ppAir Freight & Logistics0.54%-0.44 ppConstruction Machinery & Heavy Transportation Equipment0.39%-0.44 ppRail Transportation0.59%-0.36 ppElectrical Components & Equipment0.40%-0.32 ppPassenger Airlines0.32%-0.23 ppBuilding Products0.25%-0.21 ppHuman Resource & Employment Services0.29%-0.16 ppAgricultural & Farm Machinery0.15%-0.16 ppEnvironmental & Facilities Services0.20%-0.15 ppResearch & Consulting Services0.12%-0.06 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
0.40%
Industry change · 12M
-0.32 pp
Electrical Components & Equipment · contribution
-0.318 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $48.2bn | 0.156% | -0.115 pp | -0.109 pp | +8.4% | No |
| Eaton Corporation → ETN | United States | $36.0bn | 0.116% | -0.087 pp | -0.095 pp | +0.7% | No |
| Rockwell Automation → ROK | United States | $22.3bn | 0.072% | -0.062 pp | -0.072 pp | -6.9% | No |
| Ametek → AME | United States | $17.8bn | 0.058% | -0.045 pp | -0.043 pp | +1.2% | 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.