** Shares of regional lender Comerica CMA.N jump 13.4% to $80 in premarket
** Fifth Third Bancorp FITB.O to buy CMA in an all stock deal valued at $10.9 billion; FITB down 1.5% to $43.75 premarket
** Deal will create 9th largest U.S. bank, with about $288 billion in assets - cos
** At deal close, FITB shareholders to own ~73% and CMA shareholders will own ~27% of combined co
** As of last close, Comerica up nearly 14% YTD, while FITB up 5%
(Reporting by Pritam Biswas in Bengaluru)
((Pritam.Biswas@thomsonreuters.com))