Observatory · observe first
S&P Global
SPGI · United States · Financial Exchanges & Data · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.340%
12M weight contribution
+0.340 pp
3M weight contribution
+0.010 pp
12M price return
+18.8%
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 | $96.9bn | 0.340% | +0.340 pp | +18.8% | Yes |
| Aug 2021 | $101.2bn | 0.338% | +0.338 pp | +22.1% | Yes |
| Jul 2021 | $97.7bn | 0.335% | +0.335 pp | +23.4% | Yes |
| Jun 2021 | $93.5bn | 0.330% | +0.330 pp | +25.6% | Yes |
| May 2021 | $86.5bn | 0.310% | +0.309 pp | +17.7% | Yes |
| Apr 2021 | $89.0bn | 0.322% | -0.051 pp | +34.4% | Yes |
| Mar 2021 | $80.4bn | 0.157% | +0.157 pp | +45.2% | No |
| Feb 2021 | $75.0bn | 0.150% | +0.150 pp | +24.9% | No |
| Jan 2021 | $72.2bn | 0.173% | -0.162 pp | +8.8% | No |
| Dec 2020 | $74.8bn | 0.303% | -0.007 pp | +21.4% | Yes |
| Nov 2020 | $80.1bn | 0.340% | +0.032 pp | +34.0% | Yes |
| Oct 2020 | $73.5bn | 0.348% | +0.037 pp | +26.2% | Yes |
| Sep 2020 | $82.2bn | 0.000% | -0.303 pp | +48.4% | No |
| Aug 2020 | $83.5bn | 0.000% | -0.329 pp | +42.0% | No |
| Jul 2020 | $79.9bn | 0.000% | -0.303 pp | +44.3% | No |
| Jun 2020 | $75.1bn | 0.000% | -0.286 pp | +45.9% | No |
| May 2020 | $74.1bn | 0.000% | -0.290 pp | +53.3% | No |
| Apr 2020 | $66.8bn | 0.374% | +0.084 pp | +34.0% | Yes |
| Mar 2020 | $56.5bn | 0.000% | -0.284 pp | +17.5% | No |
| Feb 2020 | $61.3bn | 0.000% | -0.273 pp | +34.0% | No |
| Jan 2020 | $67.9bn | 0.335% | +0.185 pp | +54.8% | Yes |
| Dec 2019 | $63.1bn | 0.310% | +0.166 pp | +62.3% | No |
| Nov 2019 | $61.2bn | 0.308% | +0.164 pp | +46.2% | Yes |
| Oct 2019 | $59.7bn | 0.311% | +0.164 pp | +43.0% | 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.