The world's biggest manufacturer of mainframe computers and No. 2 software maker said on Tuesday that net income rose 12 percent to $4.43 billion, or $3.28 per share, in the fourth quarter ended December 31, from $3.95 billion, or $2.80 per share, a year earlier. That easily beat the average analyst forecast of $3.03.

Revenue fell 6.4 percent to $27.0 billion.

The Armonk, New York company also said it expects to report 2009 earnings of at least $9.20 per share.

IBM shares rose $2.85 to $84.83 in extended trading. They had closed down 3.5 percent on the New York Stock Exchange.

(Reporting by Jim Finkle; editing by Richard Chang)