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 & Materials0.33%-31.37 ppIndustrial Gases0.64%+0.13 ppSpecialty Chemicals0.53%+0.06 ppFertilizers & Agricultural Chemicals0.17%+0.05 ppGold0.13%+0.04 ppCommodity Chemicals0.04%-0.03 ppConstruction Materials0.15%+0.02 ppCopper0.13%-0.02 ppSteel0.10%-0.02 ppMetal, Glass & Plastic Containers0.03%-0.01 pp
3 · Sub-industry
Inside Copper
Copper · weight
0.13%
Industry change · 12M
-0.02 pp
Copper · contribution
-0.020 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 |
|---|---|---|---|---|---|---|---|
| Freeport-McMoRan → FCX | United States | $55.3bn | 0.125% | +0.007 pp | -0.020 pp | -26.0% | Yes |
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.