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 & Defense3.13%-3.95 ppIndustrial Conglomerates0.67%-0.70 ppIndustrial Machinery & Supplies & Components0.51%-0.56 ppAir Freight & Logistics0.50%-0.48 ppConstruction Machinery & Heavy Transportation Equipment0.36%-0.47 ppRail Transportation0.59%-0.36 ppElectrical Components & Equipment0.37%-0.35 ppPassenger Airlines0.30%-0.25 ppBuilding Products0.23%-0.23 ppHuman Resource & Employment Services0.29%-0.16 ppAgricultural & Farm Machinery0.15%-0.16 ppEnvironmental & Facilities Services0.23%-0.12 ppResearch & Consulting Services0.11%-0.07 ppTrading Companies & Distributors0.05%-0.06 ppData Processing & Outsourced Services0.05%+0.05 ppCargo Ground Transportation0.04%-0.03 ppConstruction & Engineering0.05%-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
0.37%
Industry change · 12M
-0.35 pp
Electrical Components & Equipment · contribution
-0.348 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $42.7bn | 0.145% | -0.121 pp | -0.120 pp | -4.1% | No |
| Eaton Corporation → ETN | United States | $31.1bn | 0.105% | -0.105 pp | -0.106 pp | -13.2% | No |
| Rockwell Automation → ROK | United States | $20.3bn | 0.069% | -0.066 pp | -0.075 pp | -15.3% | No |
| Ametek → AME | United States | $15.6bn | 0.053% | -0.052 pp | -0.048 pp | -11.6% | 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.