 Shares of Mitsubishi UFJ Financial Group Inc. MUFG, -2.23 rallied 4.6 in premarket trading Tuesday, after U.S. Bancorp USB, -2.33 announced an agreement to buy MUFG Union Banks regional banking franchise from Mitsubishi UFJ in a cash and stock deal valued at 8 billion. U.S. Bancorp shares were indicated up nearly 1 ahead of the open. 