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

Financials14.2%+1.72 ppInformation Technology28.5%+1.35 ppConsumer Discretionary7.8%+0.98 ppEnergy2.5%+0.82 ppMaterials3.2%+0.05 ppReal Estate3.2%+0.01 ppHealth Care16.5%-0.40 ppUtilities3.0%-0.41 ppCommunication Services3.9%-1.00 ppConsumer Staples7.0%-1.51 ppIndustrials10.2%-1.61 pp

2 · Industry

Inside Materials

Specialty Chemicals0.94%+0.24 ppGold0.14%-0.10 ppPaper & Plastic Packaging Products & Materials0.48%-0.09 ppIndustrial Gases0.77%-0.07 ppCopper0.18%+0.07 ppSteel0.11%+0.04 ppMetal, Glass & Plastic Containers0.10%-0.04 ppCommodity Chemicals0.14%-0.02 ppFertilizers & Agricultural Chemicals0.20%+0.02 ppConstruction Materials0.17%-0.00 pp

3 · Sub-industry

Inside Steel

Steel0.11%+0.041 pp
Concentrated

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

View all contributions →
Steel · weight
0.11%
Industry change · 12M
+0.04 pp
Steel · contribution
+0.041 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Oct 2021 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$32.8bn0.110%+0.003 pp+0.041 pp+138.8%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.