— Know what they know.
Not Investment Advice
Also trades as: 0HYA.L (LSE) · $vol 1M · CIE1.DE (XETRA) · $vol 0M

CIEN Short Interest

Ciena Corporation
1W: +2.7% 1M: +2.0% 3M: +6.3% YTD: +42.7% 1Y: +96.1% 3Y: +743.3% 5Y: +566.0%
$351.15
+15.22 (+4.53%)
 
Weekly Expected Move ±14.0%
$231 $275 $320 $365 $410
NYSE · Technology · Communication Equipment · Tech Score Sell · Power 41 · $49.8B mcap · 141M float · 1.85% daily turnover · Short 51% of daily vol
Credit Risk of going bust: lower than 69% of companies Debt: 0.5% of company value Bonds: $165.2M held by 117 funds, 126 bp over Treasuries → details ▾
Of US companies ranked in the safest four tenths, about 1 in 3,500 filed for bankruptcy within a year (2020-2025).
If the stock fell to about $0.28 (down 99.9%), Ciena Corporation would be worth roughly what it owes.
Total debt $237.2M against a stock market value of $49.80B.
Distance to default 7.46 (Merton model): prices to 2026-10-27, balance sheet 2026-08-01, debt counted $124.7M (short-term plus half of long-term), stock volatility 77.1%; Altman Z 7.26. A ranking and a back-test, not a forecast.
Bond figures are fund-reported marks (SEC N-PORT) as of Jul 2026. How these are computed.

Short Volume Summary

2026-10-26
52.8%
Short Ratio
of total volume
49.7%
20-Day Avg
45.2%
50-Day Avg
▲ Rising
5-Day Trend
0.8M
Short Volume
1.5M
Total Volume

Daily Short Volume Ratio

Short Volume vs Total Volume

Exchange Breakdown

2026-10-26
ExchangeShort VolumeTotal VolumeShort %
NASDAQ 774,609 1,471,444 52.6%
NYSE 31,024 55,194 56.2%
BATS 7,479 13,451 55.6%

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms