Ciena (CIEN) is a Zacks Rank #5 (Strong Sell) after the company recently missed the mark on its earnings report.  This article will look at why this stock is a Zacks Rank #5 (Strong Sell) as it is the Bear of the Day.Description                       Ciena Corp. is a network technology company, which engages in the provision of hardware, software, and services to network operators, as well as enabling enhanced network capacity, service delivery, and automation. It operates through the following segments: Ne ...