Rail Transportation
Rail Transportation is losing market weight. Lost weight for 1 consecutive month.
Most of this industry's losses came from a few companies.
Where did the weight change come from?
12-month contribution in universe percentage points · contributions add to the industry change
The three largest same-direction contributors explain 100% 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 2021 – Dec 2025 · market weight (%)
Relative performance
Industry return versus ACWI · no future data shown
Is participation broad or concentrated?
Actual constituent counts at this date, not the legacy synthetic breadth proxy
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
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
| Company | Sub-industry | Country | Universe weight | 12M contribution | 12M price return | Revisions |
|---|---|---|---|---|---|---|
| Union Pacific Corporation → UNP | Rail Transportation | United States | 0.269% | -0.045 pp | +3.9% | 0.0 |
| CSX Corporation → CSX | Rail Transportation | United States | 0.132% | -0.009 pp | +14.1% | 0.0 |
| Norfolk Southern → NSC | Rail Transportation | United States | 0.127% | +0.006 pp | +25.6% | 0.0 |
Underlying monthly industry observations
| Month | Weight | 1M change | 3M change | 6M change | 12M change | Relative return · 12M |
|---|---|---|---|---|---|---|
| Dec 2025 | 0.528% | -0.000 pp | -0.020 pp | -0.025 pp | -0.047 pp | -9.4% |
| Nov 2025 | 0.528% | +0.016 pp | -0.003 pp | -0.033 pp | -0.092 pp | -15.5% |
| Oct 2025 | 0.512% | -0.036 pp | -0.037 pp | -0.045 pp | -0.104 pp | -15.3% |
| Sep 2025 | 0.548% | +0.017 pp | -0.005 pp | -0.050 pp | -0.088 pp | -10.7% |
| Aug 2025 | 0.531% | -0.018 pp | -0.030 pp | -0.063 pp | -0.147 pp | -17.5% |
| Jul 2025 | 0.549% | -0.004 pp | -0.008 pp | -0.054 pp | +0.055 pp | -14.3% |
| Jun 2025 | 0.553% | -0.008 pp | -0.046 pp | -0.022 pp | +0.081 pp | -8.7% |
| May 2025 | 0.561% | +0.003 pp | -0.033 pp | -0.060 pp | +0.066 pp | -11.9% |
| Apr 2025 | 0.557% | -0.041 pp | -0.046 pp | -0.059 pp | -0.201 pp | -17.5% |
| Mar 2025 | 0.599% | +0.005 pp | +0.024 pp | -0.038 pp | -0.178 pp | -13.5% |
| Feb 2025 | 0.593% | -0.010 pp | -0.027 pp | -0.084 pp | -0.227 pp | -16.9% |
| Jan 2025 | 0.603% | +0.028 pp | -0.013 pp | +0.110 pp | -0.207 pp | -15.1% |
| Dec 2024 | 0.575% | -0.046 pp | -0.061 pp | +0.103 pp | -0.235 pp | -18.2% |
| Nov 2024 | 0.621% | +0.004 pp | -0.057 pp | +0.126 pp | -0.160 pp | -8.6% |
| Oct 2024 | 0.616% | -0.020 pp | +0.123 pp | -0.142 pp | -0.161 pp | -10.8% |
| Sep 2024 | 0.636% | -0.041 pp | +0.164 pp | -0.141 pp | -0.134 pp | -7.3% |
| Aug 2024 | 0.677% | +0.184 pp | +0.183 pp | -0.143 pp | -0.092 pp | -3.1% |
| Jul 2024 | 0.494% | +0.021 pp | -0.264 pp | -0.317 pp | -0.076 pp | -7.3% |
| Jun 2024 | 0.472% | -0.022 pp | -0.305 pp | -0.338 pp | -0.096 pp | -11.2% |
| May 2024 | 0.495% | -0.263 pp | -0.326 pp | -0.286 pp | -0.066 pp | -4.9% |
| Apr 2024 | 0.758% | -0.019 pp | -0.052 pp | -0.020 pp | -0.012 pp | +1.4% |
| Mar 2024 | 0.777% | -0.043 pp | -0.033 pp | +0.007 pp | -0.019 pp | +1.3% |
| Feb 2024 | 0.820% | +0.010 pp | +0.039 pp | +0.050 pp | -0.027 pp | +0.1% |
| Jan 2024 | 0.810% | -0.000 pp | +0.033 pp | +0.241 pp | -0.037 pp | +1.3% |
| Dec 2023 | 0.810% | +0.029 pp | +0.040 pp | +0.242 pp | -0.090 pp | -6.6% |
| Nov 2023 | 0.781% | +0.003 pp | +0.011 pp | +0.220 pp | -0.108 pp | -9.8% |
| Oct 2023 | 0.777% | +0.008 pp | +0.208 pp | +0.008 pp | -0.057 pp | -7.9% |
| Sep 2023 | 0.770% | -0.000 pp | +0.202 pp | -0.026 pp | -0.126 pp | -11.2% |
| Aug 2023 | 0.770% | +0.200 pp | +0.209 pp | -0.077 pp | -0.179 pp | -15.5% |
| Jul 2023 | 0.569% | +0.001 pp | -0.200 pp | -0.277 pp | -0.359 pp | -9.0% |
| Jun 2023 | 0.568% | +0.007 pp | -0.227 pp | -0.332 pp | -0.409 pp | -10.4% |
| May 2023 | 0.561% | -0.208 pp | -0.286 pp | -0.327 pp | -0.391 pp | -9.3% |
| Apr 2023 | 0.769% | -0.026 pp | -0.077 pp | -0.065 pp | -0.255 pp | -16.5% |
| Mar 2023 | 0.796% | -0.051 pp | -0.105 pp | -0.100 pp | -0.297 pp | -17.2% |
| Feb 2023 | 0.847% | +0.000 pp | -0.041 pp | -0.102 pp | -0.168 pp | -3.8% |
| Jan 2023 | 0.847% | -0.053 pp | +0.013 pp | -0.082 pp | -0.160 pp | -3.8% |
| Dec 2022 | 0.900% | +0.012 pp | +0.005 pp | -0.077 pp | -0.118 pp | +2.9% |
| Nov 2022 | 0.888% | +0.054 pp | -0.060 pp | -0.063 pp | -0.101 pp | +7.5% |
| Oct 2022 | 0.834% | -0.061 pp | -0.094 pp | -0.190 pp | -0.190 pp | +2.2% |
| Sep 2022 | 0.896% | -0.053 pp | -0.082 pp | -0.197 pp | +0.004 pp | +20.6% |
| Aug 2022 | 0.949% | +0.020 pp | -0.003 pp | -0.066 pp | +0.021 pp | +21.5% |
| Jul 2022 | 0.928% | -0.049 pp | -0.096 pp | -0.078 pp | -0.029 pp | +15.0% |
| Jun 2022 | 0.977% | +0.026 pp | -0.115 pp | -0.041 pp | +0.141 pp | +11.2% |
| May 2022 | 0.952% | -0.073 pp | -0.063 pp | -0.038 pp | +0.075 pp | +2.6% |
| Apr 2022 | 1.024% | -0.068 pp | +0.018 pp | -0.000 pp | +0.144 pp | +9.7% |
| Mar 2022 | 1.092% | +0.078 pp | +0.074 pp | +0.201 pp | +0.623 pp | +11.9% |
| Feb 2022 | 1.015% | +0.008 pp | +0.025 pp | +0.087 pp | +0.566 pp | +6.7% |
| Jan 2022 | 1.007% | -0.011 pp | -0.018 pp | +0.049 pp | +0.492 pp | +7.6% |
| Dec 2021 | 1.018% | +0.028 pp | +0.126 pp | +0.182 pp | +0.112 pp | +5.1% |
| Nov 2021 | 0.990% | -0.035 pp | +0.062 pp | +0.112 pp | +0.052 pp | -2.7% |
| Oct 2021 | 1.025% | +0.133 pp | +0.067 pp | +0.144 pp | +0.112 pp | +2.3% |
| Sep 2021 | 0.892% | -0.036 pp | +0.056 pp | +0.423 pp | +0.891 pp | -16.2% |
| Aug 2021 | 0.927% | -0.030 pp | +0.050 pp | +0.478 pp | +0.926 pp | -8.1% |
| Jul 2021 | 0.957% | +0.121 pp | +0.077 pp | +0.442 pp | +0.956 pp | -1.4% |
| Jun 2021 | 0.836% | -0.041 pp | +0.367 pp | -0.070 pp | +0.835 pp | -0.5% |
| May 2021 | 0.877% | -0.003 pp | +0.428 pp | -0.060 pp | +0.876 pp | +0.2% |
| Apr 2021 | 0.880% | +0.411 pp | +0.365 pp | -0.032 pp | -0.067 pp | +1.8% |
| Mar 2021 | 0.469% | +0.020 pp | -0.437 pp | +0.468 pp | +0.468 pp | +8.4% |
| Feb 2021 | 0.449% | -0.066 pp | -0.488 pp | +0.448 pp | +0.448 pp | +3.0% |
| Jan 2021 | 0.515% | -0.391 pp | -0.397 pp | +0.514 pp | -0.465 pp | -3.5% |
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.