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

Consumer Discretionary11.2%+3.78 ppEnergy3.9%+1.03 ppHealth Care16.9%+0.53 ppUtilities3.4%+0.25 ppIndustrials10.1%+0.16 ppReal Estate3.3%+0.09 ppMaterials3.3%+0.07 ppConsumer Staples7.4%+0.03 ppCommunication Services3.4%-0.27 ppFinancials12.7%-1.04 ppInformation Technology24.5%-4.63 pp

2 · Industry

Inside Materials

Steel0.22%+0.12 ppSpecialty Chemicals0.78%-0.08 ppFertilizers & Agricultural Chemicals0.27%+0.05 ppIndustrial Gases0.80%+0.04 ppMetal, Glass & Plastic Containers0.06%-0.04 ppCopper0.22%+0.03 ppPaper & Plastic Packaging Products & Materials0.46%-0.02 ppGold0.14%-0.02 ppConstruction Materials0.16%-0.01 ppCommodity Chemicals0.14%-0.01 pp

3 · Sub-industry

Inside Construction Materials

Construction Materials0.16%-0.007 pp
Concentrated

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

View all contributions →
Construction Materials · weight
0.16%
Industry change · 12M
-0.01 pp
Construction Materials · contribution
-0.007 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Martin Marietta Materials →
MLM
United States$22.3bn0.076%+0.002 pp-0.005 pp-6.9%No
Vulcan Materials Company →
VMC
United States$24.4bn0.083%+0.006 pp-0.002 pp-2.8%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.