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 & Defense5.52%+2.81 ppIndustrial Conglomerates1.35%+0.66 ppIndustrial Machinery & Supplies & Components0.99%+0.44 ppRail Transportation0.96%+0.36 ppConstruction Machinery & Heavy Transportation Equipment0.71%+0.32 ppElectrical Components & Equipment0.65%+0.27 ppHuman Resource & Employment Services0.53%+0.23 ppAir Freight & Logistics0.72%+0.20 ppEnvironmental & Facilities Services0.42%+0.19 ppBuilding Products0.43%+0.19 ppPassenger Airlines0.46%+0.13 ppAgricultural & Farm Machinery0.27%+0.10 ppResearch & Consulting Services0.21%+0.10 ppDiversified Support Services0.12%+0.10 ppTrading Companies & Distributors0.11%+0.06 ppConstruction & Engineering0.08%+0.04 ppData Processing & Outsourced Services0.07%+0.03 ppCargo Ground Transportation0.06%+0.02 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.96%
Industry change · 12M
+0.36 pp
Rail Transportation · contribution
+0.365 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2019 · 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 | $122.2bn | 0.615% | -0.005 pp | +0.239 pp | +17.0% | No |
| Norfolk Southern → NSC | United States | $50.5bn | 0.254% | +0.005 pp | +0.100 pp | +15.6% | No |
| CSX Corporation → CSX | United States | $18.7bn | 0.094% | -0.003 pp | +0.026 pp | -0.2% | 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.