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 Health Care
Biotechnology3.20%-0.18 ppPharmaceuticals5.60%+0.10 ppHealth Care Equipment2.92%+0.10 ppHealth Care Services0.63%-0.07 ppManaged Health Care1.90%-0.06 ppHealth Care Distributors0.47%-0.04 ppLife Sciences Tools & Services1.53%+0.02 ppHealth Care Facilities0.21%+0.00 ppHealth Care Supplies0.14%+0.00 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.63%
Industry change · 12M
-0.07 pp
Health Care Services · contribution
-0.074 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| CVS Health → CVS | United States | $63.1bn | 0.387% | -0.067 pp | -0.067 pp | -20.9% | No |
| DaVita → DVA | United States | $12.0bn | 0.074% | -0.008 pp | -0.008 pp | -15.5% | No |
| Quest Diagnostics → DGX | United States | $13.6bn | 0.083% | +0.001 pp | +0.001 pp | -5.2% | Yes |
| Labcorp → LH | United States | $14.2bn | 0.087% | -0.000 pp | -0.000 pp | -7.3% | 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.