Stocks to Watch: Starwood Hotels, VMware, Noble Corp and More...

Stocks opened lower Friday following a weaker-than-expected second quarter GDP report and as investors cautiously waited for Bernanke's speech at a banking conference in Jackson Hole, Wyoming.

The Dow Jones Industrial Average opened lower after snapping a three-day rallyin the previous session.

Here are six stocks that are on the move:

Research In Motion
The mobile communications company was upgraded to buy from neutral at Sterne Agee.

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Starwood Hotels
The hotel and resort operator was downgraded to equal-weight from overweight at Morgan Stanley, citing a weak macro environment.

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VMware
The virtualization software developer was upgraded to outperform from sector perform at Pacific Crest with a price target of $100.

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First Solar
The solar technology company was upgraded to buy from neutral at Collins Stewart based on large project approvals.

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Aruba Networks
The telecom equipment corporation was upgraded to market perform from underperform at BMO Capital based on revenue growth.

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Noble Corporation
The offshore drilling contractor was upgraded to buy from neutral at Guggenheim with a $44 price target.

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