Warren Buffett: “Owning IBM shares could prove a mistake”

Berkshire, which held an 8.59 percent stake in IBM as of Dec. 31, 2015, said in an annual shareholder letter on Saturday that it planned to keep that stake despite a $2.6-billion paper loss at the end of last year.

Buffett told the cable television network he did not think he was wrong for owning IBM shares so far, but said it “could be” a mistake.

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