Warren Buffett. (iStock).
New York - Warren Buffett announced that he's sold about a third of the 81 million shares he holds in IBM, sending the stock sharply lower before the opening bell.
Buffett bought into IBM when its stock was near an all-time high, but it's been in decline since then as Amazon and Microsoft have dominated the cloud.
Buffet said Friday: "I don't value IBM the same way that I did six years ago when I started buying."
However, he added that Berkshire Hathaway, which kicks off its annual meeting on Saturday, could still buy IBM shares.
Two days ago, Moody's downgraded IBM's senior unsecured rating.
Shares of International Business Machines Corp. dropped 3.7% to $153.15, which would make it the second-worst sell-off of the year if the trend holds.