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%-5.52 ppIndustrial Conglomerates0.00%-1.23 ppRail Transportation0.00%-1.10 ppIndustrial Machinery & Supplies & Components0.00%-0.97 ppAir Freight & Logistics0.00%-0.82 ppConstruction Machinery & Heavy Transportation Equipment0.00%-0.72 ppElectrical Components & Equipment0.00%-0.67 ppHuman Resource & Employment Services0.00%-0.56 ppPassenger Airlines0.00%-0.49 ppEnvironmental & Facilities Services0.00%-0.45 ppBuilding Products0.00%-0.45 ppAgricultural & Farm Machinery0.00%-0.29 ppResearch & Consulting Services0.00%-0.21 ppConstruction & Engineering0.00%-0.08 ppTrading Companies & Distributors0.00%-0.08 ppData Processing & Outsourced Services0.00%-0.07 ppCargo Ground Transportation0.00%-0.06 ppDiversified Support Services0.00%-0.05 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
-1.10 pp
Rail Transportation · contribution
-1.098 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 | $97.4bn | 0.000% | -0.615 pp | -0.694 pp | -13.7% | No |
| Norfolk Southern → NSC | United States | $37.6bn | 0.000% | -0.248 pp | -0.287 pp | -20.4% | No |
| CSX Corporation → CSX | United States | $14.8bn | 0.000% | -0.093 pp | -0.117 pp | -22.4% | 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.