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%+8.81 ppConsumer Discretionary7.5%+0.48 ppMaterials3.1%-0.14 ppCommunication Services5.1%-0.22 ppReal Estate2.9%-0.60 ppUtilities2.9%-0.78 ppHealth Care16.1%-0.85 ppConsumer Staples7.8%-0.86 ppIndustrials12.1%-1.12 ppEnergy1.9%-1.68 ppFinancials13.4%-3.05 pp

2 · Industry

Inside Materials

Paper & Plastic Packaging Products & Materials0.55%-0.07 ppSpecialty Chemicals0.71%-0.06 ppCopper0.15%+0.06 ppCommodity Chemicals0.17%-0.03 ppConstruction Materials0.15%-0.03 ppGold0.19%+0.02 ppMetal, Glass & Plastic Containers0.12%+0.02 ppSteel0.06%-0.02 ppFertilizers & Agricultural Chemicals0.19%-0.01 ppIndustrial Gases0.80%-0.01 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
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Martin Marietta Materials →
MLM
United States$17.7bn0.072%+0.072 pp-0.014 pp+2.6%Yes
Vulcan Materials Company →
VMC
United States$19.7bn0.080%+0.079 pp-0.014 pp+4.1%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.