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Observatory · observe first

Health Care Services

Health Care Services is losing market weight. No persistent monthly direction.

Historical time machine
Historical observation
20182026
Losing steadilyConcentrated

Most of this industry's losses came from a few companies.

Universe weight
0.00%
$0.19T
12-month change
-0.95 pp
6-month change
+0.00 pp
3-month change
-0.00 pp
Company participation
0%
above their 6M weight average

Where did the weight change come from?

12-month contribution in universe percentage points · contributions add to the industry change

Company attribution
All other companies-0.516 pp
Industry total-0.947 pp

The three largest same-direction contributors explain 87% of gross losses. Opposing contributions can make an individual company’s change larger than the industry’s net change.

How has it moved through history?

Share of matched S&P 500 members

Jan 2018 – Aug 2020 · market weight (%)

0.00.51.0201820192020

Relative performance

Industry return versus ACWI · no future data shown

7589104201820192020

Is participation broad or concentrated?

Actual constituent counts at this date, not the legacy synthetic breadth proxy

Above their 3M universe-weight average20%
Above their 6M universe-weight average0%
Above their 12M universe-weight average0%
Top 5 share of current industry market cap100.0%

This is size concentration, not contribution to the 12-month change. The attribution above measures the latter.

Evidence can disagree

Independent dimensions · no combined score or bullish/bearish verdict

Allocation · 12M-0.95 pp
Relative strength · 12M-4.7%
Price index return · 12M+11.1%
Earnings revisions · unavailable0.0
Allocation lost weight while relative performance fell. Fewer than half of constituents are above their 6M weight average. These observations need not agree.
Other evidence and availability

Valuation data: unavailable; shown as zero placeholder.

Attention data: unavailable; shown as zero placeholder.

Actual fund flows: unavailable. No ETF, mutual-fund or institutional flow feed is connected.

Volume / turnover: unavailable in this dataset.

Follow the contribution to individual companies

Sorted by absolute 12-month weight contribution, not investment merit

CompanySub-industryCountryUniverse weight12M contribution12M price returnRevisions
CVS Health →
CVS
Health Care ServicesUnited States0.000%-0.430 pp+5.1%0.0
Cigna →
CI
Health Care ServicesUnited States0.000%-0.316 pp+15.2%0.0
Labcorp →
LH
Health Care ServicesUnited States0.000%-0.076 pp+4.9%0.0
Quest Diagnostics →
DGX
Health Care ServicesUnited States0.000%-0.075 pp+11.1%0.0
DaVita →
DVA
Health Care ServicesUnited States0.000%-0.049 pp+53.9%0.0
Underlying monthly industry observations
MonthWeight1M change3M change6M change12M changeRelative return · 12M
Aug 20200.001%+0.000 pp-0.000 pp+0.000 pp-0.947 pp-4.7%
Jul 20200.001%-0.000 pp-1.071 pp-0.986 pp-0.930 pp+5.0%
Jun 20200.001%-0.000 pp+0.000 pp-1.035 pp-0.906 pp+16.9%
May 20200.001%-1.070 pp+0.000 pp-1.060 pp-0.919 pp+23.9%
Apr 20201.072%+1.071 pp+0.085 pp+0.083 pp+0.143 pp+26.3%
Mar 20200.001%+0.000 pp-1.035 pp-0.939 pp-0.948 pp+23.1%
Feb 20200.001%-0.986 pp-1.060 pp-0.947 pp-1.013 pp+4.5%
Jan 20200.986%-0.050 pp-0.003 pp+0.056 pp+0.656 pp-4.8%
Dec 20191.036%-0.025 pp+0.096 pp+0.129 pp+0.688 pp-5.7%
Nov 20191.061%+0.072 pp+0.113 pp+0.140 pp+0.671 pp-12.9%
Oct 20190.989%+0.049 pp+0.058 pp+0.061 pp+0.611 pp-17.7%
Sep 20190.940%-0.007 pp+0.033 pp-0.008 pp+0.551 pp-22.2%
Aug 20190.948%+0.017 pp+0.027 pp-0.066 pp+0.566 pp-19.7%
Jul 20190.931%+0.024 pp+0.003 pp+0.601 pp+0.299 pp-14.5%
Jun 20190.907%-0.014 pp-0.042 pp+0.558 pp+0.250 pp-20.0%
May 20190.921%-0.008 pp-0.094 pp+0.531 pp+0.275 pp-18.2%
Apr 20190.928%-0.020 pp+0.598 pp+0.550 pp+0.246 pp-22.4%
Mar 20190.949%-0.065 pp+0.600 pp+0.560 pp+0.317 pp-14.5%
Feb 20191.014%+0.684 pp+0.624 pp+0.632 pp+0.349 pp-13.4%
Jan 20190.330%-0.019 pp-0.048 pp-0.302 pp-0.376 pp-10.3%
Dec 20180.349%-0.041 pp-0.040 pp-0.308 pp-0.357 pp-6.0%
Nov 20180.390%+0.011 pp+0.008 pp-0.256 pp-0.316 pp+4.9%
Oct 20180.378%-0.010 pp-0.253 pp-0.303 pp-0.327 pp+1.4%
Sep 20180.389%+0.007 pp-0.268 pp-0.242 pp-0.317 pp+1.9%
Aug 20180.382%-0.250 pp-0.264 pp-0.283 pp-0.324 pp-0.6%
Jul 20180.632%-0.025 pp-0.050 pp-0.074 pp-0.074 pp-8.8%
Jun 20180.657%+0.011 pp+0.026 pp-0.049 pp-0.049 pp-6.5%
May 20180.646%-0.036 pp-0.019 pp-0.060 pp-0.060 pp-8.6%
Apr 20180.682%+0.051 pp-0.024 pp-0.024 pp-0.024 pp-4.5%
Mar 20180.631%-0.034 pp-0.074 pp-0.074 pp-0.074 pp-11.6%
Feb 20180.665%-0.041 pp-0.041 pp-0.041 pp-0.041 pp-6.1%
Jan 20180.706%+0.000 pp+0.000 pp+0.000 pp+0.000 pp+0.0%
How are these descriptive states defined?

Gaining / losing: 12-month weight change above +0.005pp / below −0.005pp. Direction and speed are separate dimensions, not mutually exclusive recommendations.

Accelerating / slowing: compare the most recent 3M change with the preceding 3M change. Accelerating means a positive change speeds up by >0.02pp. Slowing means the magnitude of movement declines by >0.02pp. A falling industry can also slow.

Reversing: the last two 3M changes have opposite signs, outside a ±0.005pp tolerance. Persistence counts consecutive same-direction monthly changes.

Broad / concentrated: company attribution, not a market-cap concentration shortcut. Concentrated means the three largest same-direction contributors account for ≥70% of gross same-direction changes; otherwise broad requires ≥60% of constituents moving with the industry. Other cases are mixed.

Weights use matched S&P 500 members’ market-cap estimates, based on SEC-reported shares available by each month-end and monthly closing prices. Companies without a matched price or share record are omitted, so the denominator is the matched sample rather than every index member. These are not official float-adjusted S&P weights. Flow is not measured.