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 Chemicals0.47%-0.41 ppPaper & Plastic Packaging Products & Materials0.12%-0.15 ppConstruction Materials0.08%-0.10 ppCopper0.06%-0.10 ppIndustrial Gases0.12%-0.09 ppGold0.05%-0.07 ppSteel0.06%-0.06 ppFertilizers & Agricultural Chemicals0.08%-0.03 ppMetal, Glass & Plastic Containers0.05%-0.03 ppCommodity Chemicals0.00%+0.00 pp
3 · Sub-industry
Inside Specialty Chemicals
Specialty Chemicals · weight
0.47%
Industry change · 12M
-0.41 pp
Specialty Chemicals · contribution
-0.411 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2018 · 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 |
|---|---|---|---|---|---|---|---|
| LyondellBasell → LYB | United States | $39.9bn | 0.127% | -0.134 pp | -0.142 pp | -12.1% | No |
| PPG Industries → PPG | United States | $26.4bn | 0.084% | -0.069 pp | -0.088 pp | -6.9% | No |
| Ecolab → ECL | United States | $45.3bn | 0.144% | -0.101 pp | -0.083 pp | +14.8% | No |
| Albemarle Corporation → ALB | United States | $10.8bn | 0.034% | -0.029 pp | -0.036 pp | -9.7% | No |
| International Flavors & Fragrances → IFF | United States | $11.0bn | 0.035% | -0.024 pp | -0.033 pp | -5.9% | No |
| Sherwin-Williams → SHW | United States | $14.2bn | 0.045% | -0.032 pp | -0.029 pp | +9.8% | 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.