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
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Materials
Specialty Chemicals0.83%-0.10 ppFertilizers & Agricultural Chemicals0.29%+0.09 ppCopper0.16%-0.03 ppPaper & Plastic Packaging Products & Materials0.53%+0.03 ppCommodity Chemicals0.15%-0.02 ppIndustrial Gases0.77%+0.01 ppConstruction Materials0.15%-0.01 ppMetal, Glass & Plastic Containers0.09%-0.01 ppSteel0.11%+0.01 ppGold0.18%+0.00 pp
3 · Sub-industry
Inside Construction Materials
Construction Materials · weight
0.15%
Industry change · 12M
-0.01 pp
Construction Materials · contribution
-0.013 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2022 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Vulcan Materials Company → VMC | United States | $18.9bn | 0.073% | -0.009 pp | -0.008 pp | -17.7% | No |
| Martin Marietta Materials → MLM | United States | $18.7bn | 0.073% | -0.008 pp | -0.005 pp | -14.4% | No |
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.