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 Transportation0.26%+0.26 ppAir Freight & Logistics0.34%-0.13 ppHeavy Electrical Equipment0.11%+0.09 ppConstruction Machinery & Heavy Transportation Equipment0.56%+0.09 ppIndustrial Conglomerates0.44%-0.08 ppRail Transportation0.49%-0.07 ppBuilding Products0.41%+0.07 ppElectrical Components & Equipment0.51%+0.06 ppIndustrial Machinery & Supplies & Components0.83%+0.06 ppDiversified Support Services0.17%+0.06 ppAgricultural & Farm Machinery0.20%-0.06 ppAerospace & Defense1.71%-0.04 ppEnvironmental & Facilities Services0.36%+0.04 ppHuman Resource & Employment Services0.27%-0.03 ppTrading Companies & Distributors0.12%+0.03 ppCargo Ground Transportation0.10%+0.02 ppResearch & Consulting Services0.12%-0.02 ppPassenger Airlines0.13%-0.01 ppConstruction & Engineering0.10%+0.01 ppData Processing & Outsourced Services0.05%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.49%
Industry change · 12M
-0.07 pp
Rail Transportation · contribution
-0.066 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $66.0bn | 0.126% | -0.087 pp | -0.028 pp | +11.6% | No |
| Norfolk Southern → NSC | United States | $50.8bn | 0.097% | -0.067 pp | -0.020 pp | +10.7% | No |
| Union Pacific Corporation → UNP | United States | $142.0bn | 0.272% | -0.172 pp | -0.018 pp | +23.7% | 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.