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

Universe›Industrials›Rail Transportation›Rail Transportation

1 · Sector

Weight and 12M allocation change

Information Technology28.8%+2.60 pp Consumer Discretionary12.5%+1.60 pp Industrials10.0%+0.17 pp Energy3.5%-0.07 pp Materials2.9%-0.09 pp Real Estate2.9%-0.37 pp Health Care15.9%-0.60 pp Communication Services2.8%-0.63 pp Consumer Staples7.1%-0.63 pp Utilities2.9%-0.75 pp Financials10.7%-1.24 pp

2 · Industry

Inside Industrials

Rail Transportation0.77%-0.18 pp Construction Machinery & Heavy Transportation Equipment0.76%+0.17 pp Industrial Machinery & Supplies & Components1.16%+0.15 pp Electrical Components & Equipment0.70%+0.14 pp Air Freight & Logistics0.64%-0.12 pp Industrial Conglomerates0.69%-0.10 pp Aerospace & Defense2.37%+0.08 pp Environmental & Facilities Services0.41%-0.06 pp Building Products0.52%+0.06 pp Human Resource & Employment Services0.47%-0.05 pp Diversified Support Services0.15%+0.04 pp Trading Companies & Distributors0.16%+0.03 pp Heavy Electrical Equipment0.02%-0.03 pp Construction & Engineering0.14%+0.02 pp Agricultural & Farm Machinery0.38%-0.02 pp Cargo Ground Transportation0.14%+0.02 pp Passenger Airlines0.20%+0.01 pp Research & Consulting Services0.19%+0.00 pp Data Processing & Outsourced Services0.07%-0.00 pp Passenger Ground Transportation0.00%+0.00 pp

3 · Sub-industry

Inside Rail Transportation

Rail Transportation0.77%-0.179 pp

Concentrated

Most of this industry's losses came from a few companies.

View all contributions →

Rail Transportation · weight

0.77%

Industry change · 12M

-0.18 pp

Rail Transportation · contribution

-0.179 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2023 · 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	$134.4bn	0.428%	+0.138 pp	-0.073 pp	+0.8%	Yes
Norfolk Southern → NSC	United States	$46.5bn	0.148%	+0.031 pp	-0.056 pp	-13.7%	Yes
CSX Corporation → CSX	United States	$60.6bn	0.193%	+0.039 pp	-0.049 pp	-3.2%	Yes

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.