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 & Defense0.00%-5.30 ppIndustrial Conglomerates0.00%-1.41 ppIndustrial Machinery & Supplies & Components0.00%-0.97 ppRail Transportation0.00%-0.95 ppAir Freight & Logistics0.00%-0.74 ppConstruction Machinery & Heavy Transportation Equipment0.00%-0.67 ppElectrical Components & Equipment0.00%-0.62 ppHuman Resource & Employment Services0.00%-0.53 ppPassenger Airlines0.00%-0.47 ppEnvironmental & Facilities Services0.00%-0.45 ppBuilding Products0.00%-0.44 ppAgricultural & Farm Machinery0.00%-0.28 ppResearch & Consulting Services0.00%-0.23 ppDiversified Support Services0.00%-0.13 ppTrading Companies & Distributors0.00%-0.10 ppConstruction & Engineering0.00%-0.08 ppData Processing & Outsourced Services0.00%-0.08 ppCargo Ground Transportation0.00%-0.06 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.00%
Industry change · 12M
-0.95 pp
Rail Transportation · contribution
-0.954 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2020 · 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 | $133.6bn | 0.001% | +0.000 pp | -0.605 pp | +24.2% | No |
| Norfolk Southern → NSC | United States | $54.6bn | 0.000% | +0.000 pp | -0.251 pp | +21.5% | No |
| CSX Corporation → CSX | United States | $19.8bn | 0.000% | +0.000 pp | -0.098 pp | +13.7% | 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.