Observatory · observe first
American Electric Power
AEP · United States · Electric Utilities · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.143%
12M weight contribution
+0.142 pp
3M weight contribution
-0.007 pp
12M price return
+2.8%
Share of matched S&P 500 members
Monthly observations through Sep 2021
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 |
|---|---|---|---|---|---|
| Sep 2021 | $40.6bn | 0.143% | +0.142 pp | +2.8% | No |
| Aug 2021 | $44.8bn | 0.150% | +0.150 pp | +17.6% | Yes |
| Jul 2021 | $44.1bn | 0.151% | +0.151 pp | +4.9% | Yes |
| Jun 2021 | $42.3bn | 0.149% | +0.149 pp | +9.9% | Yes |
| May 2021 | $43.0bn | 0.154% | +0.154 pp | +4.4% | Yes |
| Apr 2021 | $44.3bn | 0.161% | -0.069 pp | +10.5% | Yes |
| Mar 2021 | $42.1bn | 0.082% | +0.082 pp | +9.6% | No |
| Feb 2021 | $37.2bn | 0.074% | +0.074 pp | -13.2% | No |
| Jan 2021 | $40.2bn | 0.096% | -0.158 pp | -19.8% | No |
| Dec 2020 | $41.3bn | 0.167% | -0.062 pp | -9.0% | Yes |
| Nov 2020 | $42.1bn | 0.179% | -0.048 pp | -4.0% | Yes |
| Oct 2020 | $44.6bn | 0.211% | -0.032 pp | -1.7% | Yes |
| Sep 2020 | $40.6bn | 0.000% | -0.246 pp | -10.0% | No |
| Aug 2020 | $39.1bn | 0.000% | -0.245 pp | -10.7% | No |
| Jul 2020 | $43.1bn | 0.000% | -0.231 pp | +2.0% | No |
| Jun 2020 | $39.5bn | 0.000% | -0.234 pp | -6.7% | No |
| May 2020 | $42.2bn | 0.000% | -0.247 pp | +2.1% | No |
| Apr 2020 | $41.1bn | 0.230% | -0.005 pp | +0.1% | Yes |
| Mar 2020 | $39.5bn | 0.000% | -0.237 pp | -1.6% | No |
| Feb 2020 | $44.1bn | 0.000% | -0.232 pp | +13.3% | No |
| Jan 2020 | $51.5bn | 0.254% | +0.125 pp | +36.0% | Yes |
| Dec 2019 | $46.7bn | 0.229% | +0.097 pp | +30.5% | No |
| Nov 2019 | $45.1bn | 0.227% | +0.100 pp | +21.3% | No |
| Oct 2019 | $46.6bn | 0.243% | +0.120 pp | +33.0% | 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.