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 Technology36.8%+3.53 ppConsumer Discretionary12.0%+1.16 ppFinancials12.2%+0.79 ppCommunication Services2.5%+0.07 ppIndustrials9.8%+0.05 ppUtilities2.7%-0.09 ppEnergy2.4%-0.29 ppMaterials2.3%-0.34 ppReal Estate2.3%-0.39 ppConsumer Staples6.4%-0.84 ppHealth Care10.6%-3.65 pp

2 · Industry

Inside Materials

Specialty Chemicals0.50%-0.14 ppIndustrial Gases0.60%-0.10 ppCommodity Chemicals0.04%-0.05 ppCopper0.13%-0.02 ppGold0.17%+0.02 ppSteel0.11%-0.02 ppMetal, Glass & Plastic Containers0.03%-0.02 ppPaper & Plastic Packaging Products & Materials0.38%-0.01 ppFertilizers & Agricultural Chemicals0.16%+0.00 ppConstruction Materials0.16%-0.00 pp

3 · Sub-industry

Inside Steel

Steel0.11%-0.021 pp
Concentrated

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

View all contributions →
Steel · weight
0.11%
Industry change · 12M
-0.02 pp
Steel · contribution
-0.021 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2025 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$34.1bn0.071%+0.014 pp-0.016 pp-0.4%Yes
Steel Dynamics →
STLD
United States$19.3bn0.040%-0.001 pp-0.005 pp+11.3%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.