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 Technology30.3%+3.46 ppConsumer Discretionary8.0%+1.23 ppEnergy2.3%+0.44 ppReal Estate3.2%+0.18 ppMaterials3.2%+0.02 ppFinancials13.2%-0.02 ppUtilities3.0%-0.08 ppHealth Care16.2%-0.17 ppConsumer Staples6.9%-1.22 ppCommunication Services3.7%-1.34 ppIndustrials10.0%-2.49 pp

2 · Industry

Inside Materials

Specialty Chemicals0.96%+0.21 ppPaper & Plastic Packaging Products & Materials0.45%-0.11 ppIndustrial Gases0.77%-0.07 ppGold0.15%-0.05 ppCopper0.18%+0.04 ppSteel0.10%+0.03 ppMetal, Glass & Plastic Containers0.10%-0.03 ppCommodity Chemicals0.14%-0.03 ppConstruction Materials0.17%+0.02 ppFertilizers & Agricultural Chemicals0.20%+0.01 pp

3 · Sub-industry

Inside Construction Materials

Construction Materials0.17%+0.022 pp
Concentrated

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

View all contributions →
Construction Materials · weight
0.17%
Industry change · 12M
+0.02 pp
Construction Materials · contribution
+0.022 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Nov 2021 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Martin Marietta Materials →
MLM
United States$25.2bn0.085%+0.006 pp+0.015 pp+52.9%Yes
Vulcan Materials Company →
VMC
United States$25.4bn0.086%+0.003 pp+0.007 pp+38.3%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.