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
Paper & Plastic Packaging Products & Materials0.31%-30.61 ppIndustrial Gases0.61%+0.11 ppFertilizers & Agricultural Chemicals0.17%+0.05 ppSpecialty Chemicals0.50%+0.05 ppGold0.14%+0.05 ppCommodity Chemicals0.04%-0.03 ppConstruction Materials0.15%+0.02 ppSteel0.11%-0.00 ppCopper0.13%+0.00 ppMetal, Glass & Plastic Containers0.03%-0.00 pp
3 · Sub-industry
Inside Commodity Chemicals
Commodity Chemicals · weight
0.04%
Industry change · 12M
-0.03 pp
Commodity Chemicals · contribution
-0.030 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 2025 · 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 |
|---|---|---|---|---|---|---|---|
| Dow Inc. → DOW | United States | $18.7bn | 0.040% | -0.018 pp | -0.030 pp | -46.4% | 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.