7 Stocks you need to know for Tuesday

Ann Taylor (ANN | news | PowerRating | PR Charts ) gained 17% as the retailer surprised analysts by raising its quarterly earnings forecast to between $0.45 and $0.47 per share.

The world's largest bond insurer, MBIA (MBIA | news | PowerRating | PR Charts ), reported a massive quarterly loss of $2.4 billion on Monday.

Wal-Mart (WMT | news | PowerRating | PR Charts ) announces earnings Tuesday before the market opens, with analysts expecting $0.75 EPS.

Research in Motion (RIMM | news | PowerRating | PR Charts ) introduced a new, faster Blackberry as suspicions grew that Apple (AAPL | news | PowerRating | PR Charts ) was clearing iPhone inventory to make way for a new device of their own.

Shares of Electronic Data Systems (EDS | news | PowerRating | PR Charts ) leapt by more than 25% on news that Hewlett-Packard (HPQ | news | PowerRating | PR Charts ) was in talks to buy the company.