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 Technology28.3%+2.98 pp Consumer Discretionary12.3%+1.34 pp Industrials9.9%+0.26 pp Energy3.7%+0.18 pp Materials2.9%-0.09 pp Communication Services2.9%-0.40 pp Real Estate2.8%-0.49 pp Utilities2.8%-0.68 pp Consumer Staples7.1%-0.72 pp Financials11.1%-0.86 pp Health Care16.2%-1.52 pp

2 · Industry

Inside Materials

Paper & Plastic Packaging Products & Materials0.36%-0.09 pp Fertilizers & Agricultural Chemicals0.22%-0.09 pp Industrial Gases0.82%+0.09 pp Steel0.19%+0.08 pp Specialty Chemicals0.71%-0.07 pp Gold0.10%-0.03 pp Copper0.18%+0.03 pp Construction Materials0.17%+0.01 pp Metal, Glass & Plastic Containers0.05%-0.01 pp Commodity Chemicals0.12%-0.00 pp

3 · Sub-industry

Inside Steel

Steel0.19%+0.079 pp

Concentrated

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

View all contributions →

Steel · weight

0.19%

Industry change · 12M

+0.08 pp

Steel · contribution

+0.079 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

Company	Country	Market cap	Universe weight	3M contribution	12M contribution	12M price return	Above 6M weight average
Steel Dynamics → STLD	United States	$17.8bn	0.059%	+0.017 pp	+0.059 pp	+53.4%	Yes
Nucor → NUE	United States	$38.9bn	0.130%	+0.035 pp	+0.020 pp	+48.1%	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.