Observatory · observe first
American Express
AXP · United States · Consumer Finance · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.371%
12M weight contribution
-0.107 pp
3M weight contribution
-0.003 pp
12M price return
+0.7%
Share of matched S&P 500 members
Monthly observations through Aug 2026
Company price index
A separate dimension from market allocation
Historical observations
Most recent 24 observations at or before the selected month
| Month | Market cap | Universe weight | 12M weight change | 12M return | Above 6M weight average |
|---|---|---|---|---|---|
| Aug 2026 | $223.0bn | 0.371% | -0.107 pp | +0.7% | Yes |
| Jul 2026 | $227.1bn | 0.396% | -0.043 pp | +13.5% | Yes |
| Jun 2026 | $230.8bn | 0.401% | -0.081 pp | +7.2% | Yes |
| May 2026 | $215.9bn | 0.374% | -0.093 pp | +8.8% | Yes |
| Apr 2026 | $220.4bn | 0.299% | -0.149 pp | +22.5% | No |
| Mar 2026 | $207.7bn | 0.302% | -0.146 pp | +13.6% | No |
| Feb 2026 | $212.1bn | 0.291% | -0.182 pp | +3.7% | No |
| Jan 2026 | $242.6bn | 0.464% | -0.033 pp | +12.1% | No |
| Dec 2025 | $254.8bn | 0.499% | +0.025 pp | +26.0% | Yes |
| Nov 2025 | $251.6bn | 0.494% | +0.021 pp | +21.2% | Yes |
| Oct 2025 | $248.5bn | 0.487% | +0.040 pp | +35.0% | Yes |
| Sep 2025 | $231.1bn | 0.463% | +0.014 pp | +23.8% | No |
| Aug 2025 | $230.5bn | 0.478% | +0.034 pp | +29.5% | Yes |
| Jul 2025 | $208.3bn | 0.439% | +0.117 pp | +19.6% | No |
| Jun 2025 | $223.5bn | 0.482% | +0.170 pp | +39.3% | Yes |
| May 2025 | $206.0bn | 0.467% | +0.137 pp | +23.9% | No |
| Apr 2025 | $186.6bn | 0.448% | -0.039 pp | +15.1% | No |
| Mar 2025 | $189.0bn | 0.449% | -0.008 pp | +19.5% | No |
| Feb 2025 | $211.4bn | 0.473% | +0.018 pp | +38.7% | Yes |
| Jan 2025 | $223.6bn | 0.497% | +0.062 pp | +59.9% | Yes |
| Dec 2024 | $209.1bn | 0.474% | +0.067 pp | +60.3% | Yes |
| Nov 2024 | $214.6bn | 0.474% | +0.086 pp | +80.6% | Yes |
| Oct 2024 | $190.3bn | 0.447% | +0.085 pp | +87.2% | Yes |
| Sep 2024 | $192.8bn | 0.449% | +0.082 pp | +84.2% | Yes |
Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.