Jefferies Takes The Bait On CIENA, Upgrades To Buy By: Benzinga via Benzinga December 21, 2015 at 08:45 AM EST Shares of Ciena Corporation (NYSE: CIEN) are down 23 percent since November 23 when they traded around ... Read More >> Related Stocks: AT&T Inc Ciena Corp Comcast Corp Ericsson ADR Verizon Communications