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 Gases0.49%-0.18 ppSpecialty Chemicals0.44%-0.16 ppPaper & Plastic Packaging Products & Materials0.32%-0.07 ppGold0.17%+0.05 ppCommodity Chemicals0.03%-0.05 ppCopper0.12%-0.03 ppFertilizers & Agricultural Chemicals0.13%-0.03 ppConstruction Materials0.15%-0.02 ppMetal, Glass & Plastic Containers0.03%-0.02 ppSteel0.11%-0.01 pp
3 · Sub-industry
Inside Commodity Chemicals
Commodity Chemicals · weight
0.03%
Industry change · 12M
-0.05 pp
Commodity Chemicals · contribution
-0.048 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $17.0bn | 0.033% | -0.002 pp | -0.048 pp | -48.0% | 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.