​Ciena Corporation (NYSE:CIEN) is one of the High-Flying Tech Stocks to Buy. On January 22, Ruben Roy from Stifel Nicolaus reiterated a Buy rating on the stock and raised the price target from $270 to$280. However, earlier on January 20, Tal Liani from Bank of America Securities downgraded Ciena Corporation (NYSE:CIEN) from Buy to Hold with a $260 price target. ​Stifel Nicolaus noted that the increased price target is based on the expectation of a “step-function increase in networking intensity.” This e ...