Shares of mobile game maker Zynga  (ZNGA) were up nearly 5% Friday morning after analysts at Morgan Stanley upgraded the stock to "overweight" from "equal weight" with a $4.50 price target. 

The price target represents a 26% upside from the stock's closing price of $3.58 on Thursday. 

The firm is bullish on the company's future, saying that in-game innovation has sparked the beginning of a multi-year turnaround for the company. 

Zynga shares have jumped more than 46% year to date, and the stock is up 48% over the past 12 months. 

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