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 & Defense2.31%-2.10 ppIndustrial Conglomerates0.88%-0.24 ppAir Freight & Logistics0.75%-0.16 ppIndustrial Machinery & Supplies & Components1.05%-0.13 ppBuilding Products0.47%-0.12 ppConstruction Machinery & Heavy Transportation Equipment0.66%-0.08 ppRail Transportation0.95%+0.07 ppHuman Resource & Employment Services0.50%+0.07 ppPassenger Airlines0.25%-0.06 ppElectrical Components & Equipment0.58%-0.06 ppEnvironmental & Facilities Services0.45%+0.05 ppHeavy Electrical Equipment0.06%-0.02 ppResearch & Consulting Services0.19%-0.01 ppConstruction & Engineering0.12%+0.01 ppAgricultural & Farm Machinery0.39%-0.01 ppTrading Companies & Distributors0.13%-0.01 ppData Processing & Outsourced Services0.06%-0.00 ppCargo Ground Transportation0.12%-0.00 ppDiversified Support Services0.11%-0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.95%
Industry change · 12M
+0.07 pp
Rail Transportation · contribution
+0.075 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $69.1bn | 0.249% | -0.009 pp | +0.158 pp | -3.6% | No |
| Norfolk Southern → NSC | United States | $57.1bn | 0.206% | -0.008 pp | -0.046 pp | -13.2% | No |
| Union Pacific Corporation → UNP | United States | $138.0bn | 0.497% | -0.046 pp | -0.038 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.