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 Technology27.2%+9.30 ppHealth Care16.9%+0.36 ppMaterials3.2%-0.04 ppConsumer Discretionary6.8%-0.33 ppCommunication Services4.9%-0.41 ppUtilities3.4%-0.47 ppConsumer Staples8.5%-0.55 ppReal Estate3.2%-0.60 ppIndustrials11.8%-1.61 ppEnergy1.6%-1.86 ppFinancials12.5%-3.80 pp

2 · Industry

Inside Materials

Specialty Chemicals0.70%-0.09 ppGold0.24%+0.07 ppCopper0.12%+0.04 ppCommodity Chemicals0.16%-0.04 ppIndustrial Gases0.84%+0.03 ppPaper & Plastic Packaging Products & Materials0.57%-0.03 ppSteel0.07%-0.02 ppMetal, Glass & Plastic Containers0.14%+0.02 ppFertilizers & Agricultural Chemicals0.18%-0.02 ppConstruction Materials0.17%-0.01 pp

3 · Sub-industry

Inside Construction Materials

Construction Materials0.17%-0.014 pp
Concentrated

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

View all contributions →
Construction Materials · weight
0.17%
Industry change · 12M
-0.01 pp
Construction Materials · contribution
-0.014 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Oct 2020 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Vulcan Materials Company →
VMC
United States$19.2bn0.091%+0.091 pp-0.008 pp+2.5%Yes
Martin Marietta Materials →
MLM
United States$16.6bn0.079%+0.078 pp-0.007 pp+2.7%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.