Butterfield Bank has bought back more of its own shares as it continues its buy-back programme.During February it brought back 83,313 common shares at an average cost of $1.297 per share, according to a filing with the Bermuda Stock Exchange. The bank also repurchased and cancelled 129 of its 8% Preferred shares at an average cost of $1,231.73During 2012 the bank repurchased 7.3 million of its shares.Announcing its annual financial report for 2012 last month, the bank revealed it had made a profit of $25.6 million and declared a $0.04 special dividend on common shares.