Here are Warren Buffett's 15 biggest investments (BRK.B)

Warren Buffett's annual letter was released Saturday.
In it he listed Berkshire Hathaway's 15 biggest investments by market value.
Watch Berkshire Hathaway trade live.
Warren Buffett's annual letter was released Saturday, and in it he listed Berkshire Hathaway's 15 biggest investments by market value.
Buffet said he and Berkshire Hathaway Vice Chairman Charlie Munger don't view the names as a "collection of ticker symbols – a financial dalliance to be terminated because of downgrades by 't