Observatory · observe first
Ciena
CIEN · United States · Communications Equipment · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.084%
12M weight contribution
+0.084 pp
3M weight contribution
-0.037 pp
12M price return
+141.5%
Share of matched S&P 500 members
Monthly observations through Sep 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 |
|---|---|---|---|---|---|
| Sep 2026 | $49.9bn | 0.084% | +0.084 pp | +141.5% | No |
| Aug 2026 | $54.2bn | 0.090% | +0.090 pp | +307.4% | No |
| Jul 2026 | $53.4bn | 0.093% | +0.093 pp | +306.1% | No |
| Jun 2026 | $69.4bn | 0.121% | +0.121 pp | +503.2% | Yes |
| May 2026 | $82.0bn | 0.142% | +0.142 pp | +624.7% | Yes |
| Apr 2026 | $74.6bn | 0.101% | +0.101 pp | +685.6% | Yes |
| Mar 2026 | $54.9bn | 0.080% | +0.080 pp | +542.4% | Yes |
| Feb 2026 | $49.1bn | 0.067% | +0.067 pp | +338.2% | 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.