(Reuters) -Class A shares of Warren Buffett's Berkshire Hathaway fell more than 3% in afternoon trading on Monday, as investors fretted over a $3.8 billion write-down and a dip in quarterly operating profit that the firm disclosed on Saturday.

Berkshire Hathaway reported a $3.76 billion write-down for its shares in Kraft Heinz during its second quarter. This write-down reveals Berkshire Hathaway’s admission that its initial investment into the food conglomerate was overvalued and is now correcting course.

Berkshire has not repurchased shares since May and has now forgone buybacks for four straight quarters, even as the stock dropped over 12 percent between Buffett’s retirement announcement and last Friday’s close, as reported by Bloomberg.