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 Technology29.9%+5.36 pp Consumer Discretionary12.3%+1.32 pp Materials2.8%-0.26 pp Communication Services2.9%-0.31 pp Industrials9.8%-0.31 pp Real Estate2.9%-0.32 pp Utilities2.9%-0.55 pp Energy3.3%-0.63 pp Consumer Staples6.8%-0.92 pp Financials11.2%-1.15 pp Health Care15.3%-2.24 pp

2 · Industry

Inside Materials

Fertilizers & Agricultural Chemicals0.18%-0.11 pp Paper & Plastic Packaging Products & Materials0.35%-0.10 pp Specialty Chemicals0.70%-0.07 pp Steel0.19%+0.06 pp Gold0.10%-0.03 pp Copper0.17%-0.03 pp Construction Materials0.18%+0.02 pp Industrial Gases0.81%+0.01 pp Commodity Chemicals0.11%-0.01 pp Metal, Glass & Plastic Containers0.05%-0.01 pp

3 · Sub-industry

Inside Steel

Steel0.19%+0.060 pp

Concentrated

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

View all contributions →

Steel · weight

0.19%

Industry change · 12M

+0.06 pp

Steel · contribution

+0.060 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Nov 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	$19.3bn	0.060%	+0.004 pp	+0.060 pp	+16.4%	Yes
Nucor → NUE	United States	$41.8bn	0.130%	-0.006 pp	-0.000 pp	+14.9%	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.