Stifel Nicolaus upgraded its rating on shares of Monolithic Power Systems (MPWR) Friday morning to "Buy" from "Hold."
Monolithic Power Systems gapped open higher Friday and has continued to rise in early trade. Shares are now up 1.58 at $19.70. The stock has climbed to a 2 1/2 month high and has re-crossed its 50-day moving average.
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