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›Materials›Steel›Steel

1 · Sector

Weight and 12M allocation change

Information Technology41.0%+4.61 ppIndustrials10.3%+0.34 ppEnergy2.4%+0.09 ppMaterials2.1%-0.14 ppUtilities2.5%-0.22 ppReal Estate2.0%-0.28 ppConsumer Discretionary11.2%-0.41 ppHealth Care10.4%-0.48 ppCommunication Services2.2%-0.51 ppConsumer Staples5.7%-1.01 ppFinancials10.3%-1.99 pp

2 · Industry

Inside Materials

Paper & Plastic Packaging Products & Materials0.17%-0.14 ppConstruction Materials0.25%+0.11 ppIndustrial Gases0.53%-0.08 ppSpecialty Chemicals0.42%-0.08 ppSteel0.15%+0.04 ppGold0.17%+0.03 ppFertilizers & Agricultural Chemicals0.14%-0.03 ppCopper0.16%+0.02 ppCommodity Chemicals0.03%-0.01 ppMetal, Glass & Plastic Containers0.03%-0.00 pp

3 · Sub-industry

Inside Steel

Steel0.15%+0.040 pp
Concentrated

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

View all contributions →
Steel · weight
0.15%
Industry change · 12M
+0.04 pp
Steel · contribution
+0.040 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jun 2026 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$50.7bn0.088%+0.032 pp+0.024 pp+74.3%Yes
Steel Dynamics →
STLD
United States$33.1bn0.058%+0.020 pp+0.017 pp+81.4%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.