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 Technology33.7%+4.42 ppFinancials12.6%+1.00 ppConsumer Staples7.2%+0.57 ppUtilities2.7%+0.11 ppCommunication Services2.7%-0.04 ppReal Estate2.5%-0.34 ppEnergy2.6%-0.50 ppMaterials2.3%-0.52 ppConsumer Discretionary11.8%-0.67 ppIndustrials9.5%-0.95 ppHealth Care12.4%-3.07 pp

2 · Industry

Inside Materials

Specialty Chemicals0.55%-0.16 ppIndustrial Gases0.65%-0.12 ppSteel0.12%-0.08 ppConstruction Materials0.14%-0.06 ppCommodity Chemicals0.06%-0.05 ppPaper & Plastic Packaging Products & Materials0.37%+0.05 ppCopper0.12%-0.04 ppFertilizers & Agricultural Chemicals0.14%-0.04 ppMetal, Glass & Plastic Containers0.03%-0.02 ppGold0.11%+0.00 pp

3 · Sub-industry

Inside Steel

Steel0.12%-0.077 pp
Concentrated

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

View all contributions →
Steel · weight
0.12%
Industry change · 12M
-0.08 pp
Steel · contribution
-0.077 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Nucor →
NUE
United States$31.7bn0.071%-0.009 pp-0.062 pp-27.5%No
Steel Dynamics →
STLD
United States$20.3bn0.045%-0.003 pp-0.015 pp+2.4%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.