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Observatory · observe first

Health Care Services

Health Care Services is losing market weight. Lost weight for 1 consecutive month.

Historical time machine
Historical observation
20182026
Reversing upwardConcentrated

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

Universe weight
0.53%
$0.23T
12-month change
-0.19 pp
6-month change
-0.17 pp
3-month change
+0.13 pp
Company participation
100%
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-0.075 pp
Industry total-0.191 pp

The three largest same-direction contributors explain 97% 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

Oct 2019 – Sep 2024 · market weight (%)

0.00.51.020202021202220232024

Relative performance

Industry return versus ACWI · no future data shown

759611620202021202220232024

Is participation broad or concentrated?

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

Above their 3M universe-weight average100%
Above their 6M universe-weight average100%
Above their 12M universe-weight average40%
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-0.19 pp
Relative strength · 12M-14.6%
Price index return · 12M+12.5%
Earnings revisions · unavailable0.0
Allocation lost weight while relative performance fell. At least 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 States0.184%-0.115 pp-6.4%0.0
Cigna →
CI
Health Care ServicesUnited States0.225%-0.057 pp+23.2%0.0
Labcorp →
LH
Health Care ServicesUnited States0.044%-0.016 pp+12.7%0.0
Quest Diagnostics →
DGX
Health Care ServicesUnited States0.040%-0.005 pp+30.3%0.0
DaVita →
DVA
Health Care ServicesUnited States0.032%+0.003 pp+73.4%0.0
Underlying monthly industry observations
MonthWeight1M change3M change6M change12M changeRelative return · 12M
Sep 20240.526%-0.012 pp+0.127 pp-0.173 pp-0.191 pp-14.6%
Aug 20240.538%+0.142 pp+0.121 pp-0.135 pp-0.125 pp-7.3%
Jul 20240.396%-0.003 pp-0.282 pp-0.279 pp-0.098 pp-11.8%
Jun 20240.398%-0.018 pp-0.300 pp-0.298 pp-0.098 pp-12.3%
May 20240.416%-0.262 pp-0.257 pp-0.230 pp-0.078 pp-6.9%
Apr 20240.678%-0.020 pp+0.003 pp-0.066 pp-0.032 pp-0.6%
Mar 20240.698%+0.025 pp+0.002 pp-0.018 pp-0.025 pp+0.8%
Feb 20240.673%-0.001 pp+0.026 pp+0.010 pp-0.153 pp-15.3%
Jan 20240.675%-0.022 pp-0.069 pp+0.181 pp-0.202 pp-18.1%
Dec 20230.697%+0.050 pp-0.020 pp+0.200 pp-0.264 pp-24.4%
Nov 20230.647%-0.097 pp-0.016 pp+0.153 pp-0.292 pp-29.0%
Oct 20230.744%+0.028 pp+0.250 pp+0.033 pp-0.190 pp-21.1%
Sep 20230.716%+0.053 pp+0.219 pp-0.007 pp-0.257 pp-24.9%
Aug 20230.663%+0.169 pp+0.169 pp-0.164 pp-0.251 pp-25.4%
Jul 20230.494%-0.003 pp-0.217 pp-0.383 pp-0.392 pp-16.9%
Jun 20230.497%+0.003 pp-0.226 pp-0.464 pp-0.463 pp-20.4%
May 20230.494%-0.216 pp-0.332 pp-0.445 pp-0.433 pp-18.2%
Apr 20230.710%-0.012 pp-0.167 pp-0.223 pp-0.196 pp-12.7%
Mar 20230.723%-0.104 pp-0.238 pp-0.250 pp-0.146 pp-5.6%
Feb 20230.826%-0.051 pp-0.113 pp-0.087 pp-0.078 pp+5.1%
Jan 20230.877%-0.084 pp-0.057 pp-0.008 pp-0.021 pp+11.1%
Dec 20220.961%+0.022 pp-0.012 pp+0.000 pp+0.093 pp+28.0%
Nov 20220.939%+0.005 pp+0.026 pp+0.012 pp+0.153 pp+42.4%
Oct 20220.934%-0.040 pp+0.048 pp+0.027 pp+0.123 pp+44.9%
Sep 20220.973%+0.060 pp+0.013 pp+0.104 pp+0.154 pp+43.0%
Aug 20220.913%+0.028 pp-0.014 pp+0.009 pp+0.099 pp+33.6%
Jul 20220.885%-0.075 pp-0.021 pp-0.012 pp+0.055 pp+25.4%
Jun 20220.960%+0.033 pp+0.092 pp+0.092 pp+0.098 pp+27.0%
May 20220.927%+0.021 pp+0.023 pp+0.142 pp+0.011 pp+14.8%
Apr 20220.906%+0.037 pp+0.009 pp+0.095 pp+0.038 pp+18.2%
Mar 20220.869%-0.035 pp+0.001 pp+0.050 pp+0.411 pp+10.2%
Feb 20220.904%+0.007 pp+0.119 pp+0.090 pp+0.485 pp+22.9%
Jan 20220.898%+0.030 pp+0.087 pp+0.067 pp+0.366 pp+11.9%
Dec 20210.868%+0.082 pp+0.049 pp+0.005 pp+0.015 pp+14.5%
Nov 20210.785%-0.025 pp-0.029 pp-0.130 pp-0.106 pp-2.3%
Oct 20210.811%-0.008 pp-0.019 pp-0.058 pp-0.030 pp+5.3%
Sep 20210.819%+0.005 pp-0.044 pp+0.361 pp+0.818 pp+8.0%
Aug 20210.814%-0.016 pp-0.102 pp+0.395 pp+0.813 pp+7.2%
Jul 20210.830%-0.033 pp-0.038 pp+0.299 pp+0.829 pp+0.8%
Jun 20210.863%-0.053 pp+0.405 pp+0.009 pp+0.862 pp-4.6%
May 20210.916%+0.047 pp+0.496 pp+0.024 pp+0.915 pp-4.9%
Apr 20210.869%+0.411 pp+0.337 pp+0.028 pp-0.203 pp-10.9%
Mar 20210.458%+0.038 pp-0.396 pp+0.457 pp+0.457 pp-9.4%
Feb 20210.420%-0.112 pp-0.472 pp+0.419 pp+0.419 pp-8.7%
Jan 20210.531%-0.322 pp-0.309 pp+0.531 pp-0.455 pp-2.6%
Dec 20200.853%-0.039 pp+0.852 pp+0.852 pp-0.183 pp-11.4%
Nov 20200.892%+0.051 pp+0.891 pp+0.891 pp-0.169 pp-10.4%
Oct 20200.841%+0.840 pp+0.840 pp-0.231 pp-0.148 pp-7.8%
Sep 20200.001%-0.000 pp-0.000 pp+0.000 pp-0.939 pp-4.5%
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%
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.