(By Balachander) A number of stocks were upgraded, downgraded and price target changed by equities research analysts on Tuesday.
Acme Packet Inc. (NASDAQ: APKT): Northland Securities upgraded the stock to "outperform" from "market perform". Shares added 2.02 percent to trade at $24.25.
Apple Inc. (NASDAQ: AAPL): UBS lowered price target on the stock to $650 from $700. Shares shed 0.46 percent to trade at $497.68.
Amgen Inc. (NASDAQ: AMGN): Credit Suisse downgraded the stock to "neutral" from "outperform". Shares inched up 0.23 percent to trade at $82.26.
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F5 Networks Inc. (NASDAQ: FFIV): Needham downgraded the stock to "hold" from "buy". Shares traded 1.96 percent lower at $94.98.
Precision Castparts Corp. (NYSE: PCP): UBS upgraded the stock to "buy" from "neutral". Shares slid 0.33 percent to trade at $184.75.
Research In Motion Ltd. (NASDAQ: RIMM): Scotia upgraded the stock to "sector outperform" from "sector perform." Paradigm Capital downgraded the stock to "hold" from "speculative buy", while raising price target to $19 from $14.50. Shares rose 9.78 percent to $17.39.