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 Chemicals0.50%-0.14 ppIndustrial Gases0.60%-0.10 ppCommodity Chemicals0.04%-0.05 ppCopper0.13%-0.02 ppGold0.17%+0.02 ppSteel0.11%-0.02 ppMetal, Glass & Plastic Containers0.03%-0.02 ppPaper & Plastic Packaging Products & Materials0.38%-0.01 ppFertilizers & Agricultural Chemicals0.16%+0.00 ppConstruction Materials0.16%-0.00 pp
3 · Sub-industry
Inside Commodity Chemicals
Commodity Chemicals · weight
0.04%
Industry change · 12M
-0.05 pp
Commodity Chemicals · contribution
-0.055 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $17.5bn | 0.036% | -0.008 pp | -0.055 pp | -50.5% | 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.