Ciena Corp (CIEN) falls 0.3% Posted on April 12, 2021 By News Team Ciena Corp (NYSE: CIEN) shares fell -0.30% to end trading Friday at $56.46 per share – a net change of $-0.17. Shares traded between $56.80 and $56.14 throughout the day. 932744 shares of Ciena Corp exchanged hands.