Ciena (NYSE:CIEN) Shares Down 7.1% - Time to Sell?

Ciena (NYSE:CIEN) shares dropped 7.1% on Monday, trading significantly below their moving averages, despite a "Moderate Buy" consensus rating and a target price of $530.56 from analysts. The company had reported strong quarterly results with 39.5% year-over-year revenue growth, yet insiders sold approximately $11 million worth of stock in the last quarter. Several large institutional investors adjusted their positions in Ciena, with some increasing and others decreasing their holdings.