Back in October, Warren Buffett had a couple of days that were billion-dollar losers, and as of now in the beginning of the year in January, the market is not doing him any favors either.
On Wednesday, January 21, 2015, IBM dropped 3.6% in trading. This will cost the Oracle of Omaha about $397 million based on owning 70,478,012 shares as of September 30. We will not learn more about his end of the year holdings until they are publicly disclosed in mid-February.
On October 20 of last year, IBM cost Berkshire Hathaway about $1 billion because of a weak earnings report. The very next day Coca-Cola cost Berkshire Hathaway another billion dollars due to lukewarm results.
Buffett first disclosed having a stake in IBM back in November 2011. Since then, overall, the stock is down roughly 10%.
With that said, he continues to have support for the company over the years and stands by the investment, which happens to be one of the biggest on the Berkshire Hathaway books.