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 Technology33.1%+5.29 ppFinancials12.3%+0.37 ppCommunication Services2.8%+0.09 ppUtilities2.9%+0.07 ppReal Estate2.5%-0.09 ppConsumer Staples7.6%-0.20 ppMaterials2.3%-0.53 ppConsumer Discretionary11.5%-0.54 ppEnergy2.4%-0.88 ppIndustrials9.9%-0.92 ppHealth Care12.6%-2.65 pp

2 · Industry

Inside Materials

Specialty Chemicals0.55%-0.14 ppIndustrial Gases0.66%-0.11 ppCopper0.12%-0.08 ppSteel0.11%-0.06 ppCommodity Chemicals0.05%-0.06 ppConstruction Materials0.16%-0.04 ppMetal, Glass & Plastic Containers0.04%-0.03 ppFertilizers & Agricultural Chemicals0.16%-0.03 ppPaper & Plastic Packaging Products & Materials0.34%+0.02 ppGold0.14%+0.01 pp

3 · Sub-industry

Inside Steel

Steel0.11%-0.064 pp
Concentrated

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

View all contributions →
Steel · weight
0.11%
Industry change · 12M
-0.06 pp
Steel · contribution
-0.064 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$27.5bn0.066%-0.001 pp-0.051 pp-28.0%No
Steel Dynamics →
STLD
United States$19.5bn0.047%+0.003 pp-0.013 pp+1.2%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.