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

Materials29.6%+26.14 ppConsumer Discretionary8.5%+1.82 ppReal Estate2.1%-1.21 ppUtilities2.3%-1.33 ppEnergy2.3%-1.64 ppCommunication Services2.1%-1.72 ppConsumer Staples5.3%-2.38 ppIndustrials6.9%-3.12 ppFinancials7.8%-5.05 ppHealth Care11.8%-5.74 ppInformation Technology21.2%-5.77 pp

2 · Industry

Inside Materials

Paper & Plastic Packaging Products & Materials27.79%+27.26 ppSpecialty Chemicals0.51%-0.38 ppIndustrial Gases0.58%-0.21 ppFertilizers & Agricultural Chemicals0.15%-0.17 ppGold0.08%-0.11 ppCommodity Chemicals0.09%-0.09 ppCopper0.12%-0.08 ppMetal, Glass & Plastic Containers0.04%-0.04 ppConstruction Materials0.13%-0.03 ppSteel0.12%-0.01 pp

3 · Sub-industry

Inside Steel

Steel0.12%-0.007 pp
Concentrated

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

View all contributions →
Steel · weight
0.12%
Industry change · 12M
-0.01 pp
Steel · contribution
-0.007 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 2023 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$33.2bn0.082%-0.069 pp-0.045 pp+1.4%No
Steel Dynamics →
STLD
United States$15.5bn0.038%-0.038 pp+0.038 pp+9.5%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.