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
Biotechnology2.50%-0.59 ppLife Sciences Tools & Services1.81%+0.27 ppHealth Care Services0.93%+0.25 ppHealth Care Equipment3.19%+0.21 ppHealth Care Distributors0.35%-0.15 ppManaged Health Care1.93%-0.15 ppPharmaceuticals5.74%+0.14 ppHealth Care Facilities0.24%+0.04 ppHealth Care Supplies0.16%+0.02 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.93%
Industry change · 12M
+0.25 pp
Health Care Services · contribution
+0.246 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2019 · 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 |
|---|---|---|---|---|---|---|---|
| Cigna → CI | United States | $60.4bn | 0.336% | +0.336 pp | +0.336 pp | -7.5% | Yes |
| CVS Health → CVS | United States | $70.5bn | 0.393% | +0.173 pp | -0.042 pp | -19.6% | Yes |
| DaVita → DVA | United States | $9.2bn | 0.051% | +0.020 pp | -0.019 pp | -12.0% | Yes |
| Labcorp → LH | United States | $13.5bn | 0.075% | +0.036 pp | -0.016 pp | -6.3% | Yes |
| Quest Diagnostics → DGX | United States | $13.0bn | 0.072% | +0.033 pp | -0.012 pp | -2.7% | 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.