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 & Defense2.40%+0.33 ppConstruction Machinery & Heavy Transportation Equipment0.68%+0.11 ppRail Transportation0.89%-0.10 ppAgricultural & Farm Machinery0.45%+0.09 ppBuilding Products0.51%-0.09 ppHeavy Electrical Equipment0.02%-0.07 ppAir Freight & Logistics0.69%-0.06 ppIndustrial Conglomerates0.84%-0.06 ppResearch & Consulting Services0.18%-0.06 ppHuman Resource & Employment Services0.52%+0.05 ppIndustrial Machinery & Supplies & Components1.07%-0.04 ppDiversified Support Services0.14%+0.04 ppEnvironmental & Facilities Services0.45%+0.03 ppCargo Ground Transportation0.12%-0.02 ppConstruction & Engineering0.12%+0.01 ppTrading Companies & Distributors0.13%-0.01 ppPassenger Airlines0.21%-0.01 ppData Processing & Outsourced Services0.06%-0.01 ppElectrical Components & Equipment0.63%-0.01 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.89%
Industry change · 12M
-0.10 pp
Rail Transportation · contribution
-0.101 pp
Company participation
33%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2022 · 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 |
|---|---|---|---|---|---|---|---|
| Union Pacific Corporation → UNP | United States | $133.7bn | 0.454% | -0.048 pp | -0.058 pp | -5.8% | No |
| CSX Corporation → CSX | United States | $68.7bn | 0.233% | -0.009 pp | -0.026 pp | -4.5% | No |
| Norfolk Southern → NSC | United States | $59.4bn | 0.202% | -0.003 pp | -0.017 pp | -1.4% | 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.