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›Construction Materials›Construction Materials

1 · Sector

Weight and 12M allocation change

Information Technology33.6%+3.90 ppConsumer Discretionary13.1%+1.27 ppFinancials12.6%+0.85 ppConsumer Staples6.8%+0.07 ppUtilities2.6%-0.07 ppCommunication Services2.5%-0.41 ppReal Estate2.3%-0.46 ppMaterials2.3%-0.48 ppIndustrials9.6%-0.62 ppEnergy2.5%-0.66 ppHealth Care12.2%-3.40 pp

2 · Industry

Inside Materials

Specialty Chemicals0.54%-0.15 ppIndustrial Gases0.64%-0.11 ppSteel0.11%-0.08 ppCopper0.11%-0.05 ppCommodity Chemicals0.06%-0.05 ppConstruction Materials0.15%-0.03 ppGold0.11%+0.03 ppMetal, Glass & Plastic Containers0.04%-0.02 ppFertilizers & Agricultural Chemicals0.16%-0.01 ppPaper & Plastic Packaging Products & Materials0.34%+0.00 pp

3 · Sub-industry

Inside Construction Materials

Construction Materials0.15%-0.028 pp
Concentrated

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

View all contributions →
Construction Materials · weight
0.15%
Industry change · 12M
-0.03 pp
Construction Materials · contribution
-0.028 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Martin Marietta Materials →
MLM
United States$33.3bn0.074%-0.011 pp-0.019 pp+7.6%No
Vulcan Materials Company →
VMC
United States$36.2bn0.081%-0.005 pp-0.009 pp+22.2%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.