Warren Buffett keeps selling Bank of America (BAC) stock. After a hiatus of some days, the Oracle of Ohama has resumed cutting stake and now owns 12% in one of the biggest American lenders. Per a Form 4 filing with the Securities and Exchange Commission yesterday, Berkshire Hathaway (BRK.B) sold almost 14 million (in total) BAC shares for three straight trading days. Berkshire now holds 928.5 million shares of Bank of America.Buffett has been an active seller of Bank of America stock, unloading shares for 1 ...