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 & Defense2.44%-1.77 ppIndustrial Conglomerates0.83%-0.22 ppRail Transportation0.98%+0.14 ppBuilding Products0.46%-0.13 ppIndustrial Machinery & Supplies & Components1.03%-0.11 ppEnvironmental & Facilities Services0.47%+0.08 ppElectrical Components & Equipment0.57%-0.07 ppPassenger Airlines0.20%-0.07 ppHuman Resource & Employment Services0.50%+0.07 ppConstruction Machinery & Heavy Transportation Equipment0.61%-0.07 ppAir Freight & Logistics0.80%-0.06 ppHeavy Electrical Equipment0.05%-0.04 ppAgricultural & Farm Machinery0.36%-0.03 ppConstruction & Engineering0.12%+0.03 ppTrading Companies & Distributors0.12%-0.01 ppResearch & Consulting Services0.19%-0.01 ppCargo Ground Transportation0.12%+0.01 ppDiversified Support Services0.12%+0.00 ppData Processing & Outsourced Services0.06%-0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.98%
Industry change · 12M
+0.14 pp
Rail Transportation · contribution
+0.141 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 |
|---|---|---|---|---|---|---|---|
| CSX Corporation → CSX | United States | $63.2bn | 0.246% | -0.031 pp | +0.160 pp | -8.4% | No |
| Norfolk Southern → NSC | United States | $54.2bn | 0.211% | -0.020 pp | -0.024 pp | -12.9% | No |
| Union Pacific Corporation → UNP | United States | $133.9bn | 0.521% | -0.065 pp | +0.005 pp | -1.0% | 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.