Warren Buffett is happy to admit his mistakes when he makes them-just don't remind him how much money he lost in the process.
IBM and Coke represent two of Berkshire Hathaway's (BRK-A) three biggest investments, but their operational missteps have already cost him $2.52 billion this week (factoring in Wednesday's early declines).
On Monday, Buffett lost nearly $1 billion on his third-largest investment, IBM (IBM), after the company posted disappointing earnings.
The losses in IBM and Coke add to a recent rough patch for Buffett, who slashed Berkshire Hathaway's (BRK-A) stake in British grocer Tesco (London Stock Exchange: TSCO-GB) earlier this month.
He has described buying into the stock as a "huge mistake."
And to be sure, it hasn't been all bad news this week-Buffett's favorite bank, Wells Fargo (WFC), is up more than $816 million since Monday morning.