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
Industrial Gases0.00%-0.86 ppSpecialty Chemicals0.00%-0.83 ppCommodity Chemicals0.00%-0.20 ppPaper & Plastic Packaging Products & Materials0.00%-0.19 ppConstruction Materials0.00%-0.18 ppGold0.00%-0.17 ppMetal, Glass & Plastic Containers0.00%-0.13 ppFertilizers & Agricultural Chemicals0.00%-0.11 ppCopper0.00%-0.09 ppSteel0.00%-0.09 pp
3 · Sub-industry
Inside Construction Materials
Construction Materials · weight
0.00%
Industry change · 12M
-0.18 pp
Construction Materials · contribution
-0.175 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2020 · 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 | $15.3bn | 0.000% | +0.000 pp | -0.098 pp | -14.8% | No |
| Martin Marietta Materials → MLM | United States | $12.9bn | 0.000% | +0.000 pp | -0.078 pp | -9.4% | 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.