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
Passenger Ground Transportation0.28%+0.28 ppAir Freight & Logistics0.35%-0.13 ppAerospace & Defense1.63%-0.11 ppRail Transportation0.47%-0.10 ppAgricultural & Farm Machinery0.19%-0.08 ppHeavy Electrical Equipment0.10%+0.08 ppIndustrial Conglomerates0.44%-0.07 ppDiversified Support Services0.17%+0.06 ppIndustrial Machinery & Supplies & Components0.79%-0.05 ppPassenger Airlines0.12%-0.04 ppHuman Resource & Employment Services0.26%-0.04 ppEnvironmental & Facilities Services0.36%+0.04 ppBuilding Products0.39%+0.02 ppResearch & Consulting Services0.13%-0.01 ppCargo Ground Transportation0.10%+0.01 ppConstruction Machinery & Heavy Transportation Equipment0.53%+0.01 ppElectrical Components & Equipment0.48%+0.01 ppTrading Companies & Distributors0.11%+0.00 ppConstruction & Engineering0.10%+0.00 ppData Processing & Outsourced Services0.04%-0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.47%
Industry change · 12M
-0.10 pp
Rail Transportation · contribution
-0.096 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2024 · 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 |
|---|---|---|---|---|---|---|---|
| CSX Corporation → CSX | United States | $65.4bn | 0.123% | -0.079 pp | -0.038 pp | -0.5% | No |
| Union Pacific Corporation → UNP | United States | $138.0bn | 0.259% | -0.157 pp | -0.030 pp | +13.1% | No |
| Norfolk Southern → NSC | United States | $48.5bn | 0.091% | -0.069 pp | -0.028 pp | -3.0% | 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.