Observatory · observe first

Steel

Steel is showing little change in market weight. Gained weight for 2 consecutive months.

Historical time machine
Historical observation
20182026
Reversing downwardConcentrated

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

Universe weight
0.11%
$0.08T
12-month change
+0.00 pp
6-month change
+0.00 pp
3-month change
-0.01 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

Sub-industries
Company attribution
Nucor →+0.004 pp
All other companies-0.002 pp
Industry total+0.002 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

May 2021 – Apr 2026 · market weight (%)

0.10.20.220222023202420252026

Relative performance

Industry return versus ACWI · no future data shown

11616822020222023202420252026

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 average100%
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+0.00 pp
Relative strength · 12M+41.5%
Price index return · 12M+86.3%
Earnings revisions · unavailable0.0
Allocation gained weight while relative performance rose. 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
Nucor →
NUE
SteelUnited States0.070%+0.004 pp+91.6%0.0
Steel Dynamics →
STLD
SteelUnited States0.045%-0.002 pp+78.7%0.0
Underlying monthly industry observations
MonthWeight1M change3M change6M change12M changeRelative return · 12M
Apr 20260.114%+0.020 pp-0.014 pp+0.002 pp+0.002 pp+41.5%
Mar 20260.094%+0.000 pp-0.028 pp-0.009 pp-0.016 pp+19.1%
Feb 20260.094%-0.034 pp-0.026 pp-0.017 pp-0.023 pp+9.9%
Jan 20260.128%+0.006 pp+0.016 pp+0.018 pp+0.018 pp+15.7%
Dec 20250.122%+0.002 pp+0.018 pp+0.016 pp+0.020 pp+18.8%
Nov 20250.120%+0.008 pp+0.009 pp+0.021 pp-0.009 pp-7.2%
Oct 20250.112%+0.009 pp+0.003 pp-0.001 pp-0.014 pp-8.0%
Sep 20250.103%-0.007 pp-0.002 pp-0.007 pp-0.025 pp-15.8%
Aug 20250.111%+0.001 pp+0.012 pp-0.006 pp-0.021 pp-10.7%
Jul 20250.110%+0.004 pp-0.003 pp-0.001 pp+0.002 pp-20.4%
Jun 20250.105%+0.007 pp-0.005 pp+0.004 pp-0.004 pp-23.2%
May 20250.099%-0.014 pp-0.018 pp-0.030 pp-0.019 pp-33.6%
Apr 20250.113%+0.002 pp+0.002 pp-0.014 pp-0.064 pp-27.0%
Mar 20250.110%-0.006 pp+0.009 pp-0.018 pp-0.087 pp-35.2%
Feb 20250.116%+0.006 pp-0.013 pp-0.015 pp-0.077 pp-29.0%
Jan 20250.110%+0.009 pp-0.016 pp+0.003 pp-0.084 pp-32.9%
Dec 20240.102%-0.027 pp-0.027 pp-0.008 pp-0.083 pp-34.2%
Nov 20240.129%+0.003 pp-0.003 pp+0.011 pp-0.061 pp-19.3%
Oct 20240.126%-0.002 pp+0.019 pp-0.051 pp-0.059 pp-20.0%
Sep 20240.128%-0.003 pp+0.019 pp-0.069 pp-0.061 pp-20.9%
Aug 20240.132%+0.024 pp+0.014 pp-0.062 pp-0.061 pp-21.8%
Jul 20240.108%-0.002 pp-0.070 pp-0.087 pp-0.026 pp-10.3%
Jun 20240.109%-0.008 pp-0.088 pp-0.075 pp-0.029 pp-12.3%
May 20240.118%-0.060 pp-0.076 pp-0.073 pp-0.003 pp+9.3%
Apr 20240.177%-0.020 pp-0.018 pp-0.008 pp-0.009 pp+1.6%
Mar 20240.197%+0.004 pp+0.013 pp+0.008 pp-0.002 pp+6.1%
Feb 20240.193%-0.001 pp+0.003 pp+0.001 pp-0.034 pp-8.0%
Jan 20240.195%+0.010 pp+0.010 pp+0.061 pp-0.026 pp-4.7%
Dec 20230.185%-0.006 pp-0.005 pp+0.047 pp+0.001 pp+6.4%
Nov 20230.190%+0.005 pp-0.002 pp+0.070 pp+0.060 pp+1.4%
Oct 20230.185%-0.004 pp+0.051 pp-0.001 pp+0.063 pp+2.1%
Sep 20230.189%-0.004 pp+0.051 pp-0.010 pp+0.079 pp+19.6%
Aug 20230.193%+0.059 pp+0.072 pp-0.034 pp+0.068 pp+8.7%
Jul 20230.133%-0.004 pp-0.053 pp-0.087 pp+0.009 pp+8.0%
Jun 20230.138%+0.018 pp-0.061 pp-0.046 pp+0.030 pp+32.3%
May 20230.120%-0.066 pp-0.107 pp-0.010 pp-0.007 pp-1.8%
Apr 20230.186%-0.013 pp-0.035 pp+0.064 pp+0.036 pp-6.9%
Mar 20230.199%-0.028 pp+0.015 pp+0.089 pp+0.064 pp+13.2%
Feb 20230.227%+0.006 pp+0.097 pp+0.103 pp+0.104 pp+41.8%
Jan 20230.221%+0.037 pp+0.099 pp+0.097 pp+0.123 pp+82.1%
Dec 20220.184%+0.053 pp+0.074 pp+0.076 pp+0.079 pp+43.8%
Nov 20220.131%+0.009 pp+0.006 pp+0.004 pp+0.028 pp+61.5%
Oct 20220.122%+0.012 pp-0.002 pp-0.029 pp+0.013 pp+49.3%
Sep 20220.110%-0.014 pp+0.002 pp-0.025 pp+0.009 pp+39.1%
Aug 20220.125%+0.000 pp-0.002 pp+0.002 pp+0.009 pp+36.9%
Jul 20220.124%+0.016 pp-0.026 pp+0.027 pp+0.017 pp+47.9%
Jun 20220.108%-0.019 pp-0.027 pp+0.004 pp+0.007 pp+30.8%
May 20220.127%-0.024 pp+0.004 pp+0.024 pp+0.017 pp+40.9%
Apr 20220.151%+0.016 pp+0.053 pp+0.041 pp+0.062 pp+103.1%
Mar 20220.135%+0.012 pp+0.030 pp+0.033 pp+0.088 pp+76.3%
Feb 20220.123%+0.025 pp+0.020 pp+0.007 pp+0.087 pp+108.0%
Jan 20220.097%-0.007 pp-0.012 pp-0.009 pp+0.062 pp+86.4%
Dec 20210.105%+0.002 pp+0.003 pp+0.003 pp+0.040 pp+84.1%
Nov 20210.103%-0.007 pp-0.013 pp-0.007 pp+0.034 pp+69.0%
Oct 20210.110%+0.008 pp+0.003 pp+0.021 pp+0.041 pp+74.6%
Sep 20210.102%-0.014 pp+0.000 pp+0.055 pp+0.101 pp+76.7%
Aug 20210.115%+0.009 pp+0.006 pp+0.080 pp+0.115 pp+106.4%
Jul 20210.107%+0.005 pp+0.018 pp+0.071 pp+0.107 pp+90.7%
Jun 20210.101%-0.009 pp+0.055 pp+0.036 pp+0.101 pp+70.7%
May 20210.110%+0.021 pp+0.074 pp+0.041 pp+0.110 pp+76.8%
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.