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 Technology32.5%+4.21 ppFinancials12.6%+0.68 ppUtilities2.9%+0.21 ppCommunication Services2.8%+0.07 ppConsumer Staples7.3%-0.17 ppReal Estate2.5%-0.21 ppEnergy2.8%-0.42 ppMaterials2.4%-0.51 ppConsumer Discretionary11.4%-0.59 ppIndustrials9.8%-0.82 ppHealth Care12.9%-2.46 pp

2 · Industry

Inside Materials

Specialty Chemicals0.56%-0.16 ppIndustrial Gases0.68%-0.09 ppSteel0.11%-0.09 ppConstruction Materials0.14%-0.06 ppCopper0.13%-0.06 ppCommodity Chemicals0.06%-0.05 ppPaper & Plastic Packaging Products & Materials0.36%+0.04 ppFertilizers & Agricultural Chemicals0.15%-0.03 ppMetal, Glass & Plastic Containers0.03%-0.02 ppGold0.13%+0.01 pp

3 · Sub-industry

Inside Steel

Steel0.11%-0.087 pp
Concentrated

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

View all contributions →
Steel · weight
0.11%
Industry change · 12M
-0.09 pp
Steel · contribution
-0.087 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$27.7bn0.066%+0.004 pp-0.066 pp-38.2%No
Steel Dynamics →
STLD
United States$18.8bn0.045%+0.005 pp-0.020 pp-14.3%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.