Key TakeawaysWarren Buffett's Berkshire Hathaway sold more shares of Bank of America, a filing Monday showed, extending Berkshire's pullback after a runup in the bank's stock price. Berkshire Hathaway sold about 18.41 million shares over the last week, bringing its stake to 961.65 million shares or 12.3% of Bank of America.The move comes after Berkshire sold about 34 million shares earlier this month, when Bank of America shares hit a two-year high following an earnings beat. Warren Buffett's Berkshire Hath ...