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Observatory · observe first

Passenger Airlines

Passenger Airlines is gaining market weight. Gained weight for 1 consecutive month.

Historical time machine
Latest available · not live
20182026
Reversing downwardConcentrated

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

Universe weight
0.19%
$0.11T
12-month change
+0.02 pp
6-month change
+0.05 pp
3-month change
-0.04 pp
Company participation
33%
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-0.001 pp
Industry total+0.017 pp

The three largest same-direction contributors explain 100% of gross gains. 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 2021 – Sep 2026 · market weight (%)

0.10.20.320222023202420252026

Relative performance

Industry return versus ACWI · no future data shown

39516320222023202420252026

Is participation broad or concentrated?

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

Above their 3M universe-weight average0%
Above their 6M universe-weight average33%
Above their 12M universe-weight average67%
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+0.02 pp
Relative strength · 12M+14.5%
Price index return · 12M+33.5%
Earnings revisions · unavailable0.0
Allocation gained weight while relative performance rose. 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
Delta Air Lines →
DAL
Passenger AirlinesUnited States0.092%+0.018 pp+48.7%0.0
United Airlines Holdings →
UAL
Passenger AirlinesUnited States0.060%-0.002 pp+15.0%0.0
Southwest Airlines →
LUV
Passenger AirlinesUnited States0.034%+0.001 pp+32.8%0.0
Underlying monthly industry observations
MonthWeight1M change3M change6M change12M changeRelative return · 12M
Sep 20260.187%+0.012 pp-0.040 pp+0.053 pp+0.017 pp+14.5%
Aug 20260.175%-0.032 pp-0.020 pp+0.036 pp-0.015 pp-4.1%
Jul 20260.208%-0.020 pp+0.082 pp+0.015 pp+0.040 pp+24.8%
Jun 20260.227%+0.032 pp+0.094 pp+0.026 pp+0.062 pp+43.7%
May 20260.195%+0.069 pp+0.056 pp+0.012 pp+0.021 pp+17.6%
Apr 20260.125%-0.008 pp-0.067 pp-0.038 pp-0.032 pp+11.6%
Mar 20260.133%-0.006 pp-0.068 pp-0.037 pp-0.034 pp+13.0%
Feb 20260.139%-0.053 pp-0.043 pp-0.051 pp-0.057 pp-1.9%
Jan 20260.193%-0.009 pp+0.029 pp+0.025 pp-0.022 pp-10.8%
Dec 20250.202%+0.019 pp+0.031 pp+0.036 pp-0.005 pp-3.7%
Nov 20250.182%+0.019 pp-0.007 pp+0.009 pp-0.022 pp-11.2%
Oct 20250.164%-0.007 pp-0.004 pp+0.006 pp-0.027 pp-12.3%
Sep 20250.170%-0.020 pp+0.005 pp+0.002 pp+0.009 pp+8.7%
Aug 20250.190%+0.022 pp+0.016 pp-0.007 pp+0.047 pp+38.9%
Jul 20250.168%+0.003 pp+0.010 pp-0.047 pp+0.062 pp+21.7%
Jun 20250.165%-0.008 pp-0.003 pp-0.041 pp+0.046 pp+5.4%
May 20250.173%+0.016 pp-0.023 pp-0.030 pp+0.047 pp+3.9%
Apr 20250.158%-0.010 pp-0.057 pp-0.033 pp-0.030 pp-7.7%
Mar 20250.168%-0.029 pp-0.039 pp+0.006 pp-0.009 pp+4.0%
Feb 20250.197%-0.018 pp-0.007 pp+0.054 pp+0.017 pp+23.3%
Jan 20250.215%+0.008 pp+0.024 pp+0.109 pp+0.047 pp+42.4%
Dec 20240.207%+0.003 pp+0.045 pp+0.087 pp+0.038 pp+38.0%
Nov 20240.204%+0.014 pp+0.061 pp+0.077 pp+0.042 pp+41.9%
Oct 20240.190%+0.029 pp+0.085 pp+0.003 pp+0.038 pp+37.5%
Sep 20240.161%+0.018 pp+0.042 pp-0.016 pp-0.018 pp-1.5%
Aug 20240.143%+0.038 pp+0.016 pp-0.036 pp-0.057 pp-22.9%
Jul 20240.105%-0.014 pp-0.082 pp-0.063 pp-0.043 pp-25.3%
Jun 20240.119%-0.007 pp-0.058 pp-0.049 pp-0.043 pp-23.2%
May 20240.127%-0.061 pp-0.052 pp-0.035 pp-0.013 pp-4.6%
Apr 20240.188%+0.010 pp+0.019 pp+0.035 pp+0.004 pp+2.2%
Mar 20240.177%-0.002 pp+0.008 pp-0.002 pp-0.014 pp-7.1%
Feb 20240.179%+0.011 pp+0.017 pp-0.021 pp-0.037 pp-17.0%
Jan 20240.168%-0.001 pp+0.016 pp+0.020 pp-0.045 pp-19.9%
Dec 20230.169%+0.007 pp-0.011 pp+0.007 pp-0.024 pp-12.6%
Nov 20230.162%+0.009 pp-0.038 pp+0.022 pp-0.044 pp-22.8%
Oct 20230.152%-0.027 pp+0.004 pp-0.031 pp-0.051 pp-29.1%
Sep 20230.180%-0.020 pp+0.018 pp-0.012 pp-0.005 pp-4.7%
Aug 20230.200%+0.052 pp+0.060 pp-0.016 pp+0.010 pp+3.5%
Jul 20230.148%-0.014 pp-0.036 pp-0.065 pp-0.041 pp+9.9%
Jun 20230.162%+0.022 pp-0.030 pp-0.031 pp-0.038 pp+17.0%
May 20230.140%-0.044 pp-0.076 pp-0.066 pp-0.110 pp-19.3%
Apr 20230.184%-0.008 pp-0.029 pp-0.020 pp-0.076 pp-26.1%
Mar 20230.192%-0.025 pp-0.001 pp+0.007 pp-0.035 pp-10.4%
Feb 20230.216%+0.003 pp+0.010 pp+0.026 pp-0.012 pp+1.7%
Jan 20230.213%+0.021 pp+0.009 pp+0.024 pp-0.008 pp+2.8%
Dec 20220.193%-0.014 pp+0.008 pp-0.008 pp-0.014 pp+0.9%
Nov 20220.206%+0.003 pp+0.016 pp-0.044 pp-0.007 pp+7.9%
Oct 20220.204%+0.019 pp+0.015 pp-0.056 pp-0.023 pp+5.0%
Sep 20220.184%-0.006 pp-0.016 pp-0.043 pp-0.072 pp-19.5%
Aug 20220.190%+0.001 pp-0.060 pp-0.038 pp-0.045 pp-10.4%
Jul 20220.189%-0.012 pp-0.070 pp-0.032 pp-0.053 pp-13.4%
Jun 20220.201%-0.050 pp-0.027 pp-0.006 pp-0.068 pp-20.1%
May 20220.250%-0.009 pp+0.022 pp+0.037 pp-0.057 pp-13.4%
Apr 20220.259%+0.032 pp+0.038 pp+0.032 pp-0.048 pp-10.4%
Mar 20220.227%-0.001 pp+0.020 pp-0.029 pp+0.061 pp-26.2%
Feb 20220.229%+0.007 pp+0.015 pp-0.007 pp+0.068 pp-25.6%
Jan 20220.221%+0.014 pp-0.006 pp-0.021 pp+0.073 pp-8.6%
Dec 20210.207%-0.007 pp-0.050 pp-0.061 pp-0.059 pp-19.3%
Nov 20210.213%-0.014 pp-0.022 pp-0.094 pp-0.068 pp-22.1%
Oct 20210.227%-0.030 pp-0.015 pp-0.080 pp-0.023 pp-8.1%
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.