** Shares of U.S. banks fall premarket
** JPMorgan JPM.N, Morgan Stanley MS.N down 1.6%, Bank of America BAC.N drops 3%, Citigroup C.N declines 2%
** On Thursday, sharp selloff in U.S. regional banks weighed on financial stocks; rising risks and deteriorating credit quality rattle investors
** Zions Bancorporation ZION.O down 1.8% after disclosing $50 million Q3 loss on two commercial loans from California division
** Western Alliance WAL.N falls 2.5% after initiating fraud lawsuit against Cantor Group V, LLC
** Bankruptcies of auto parts supplier First Brands, car dealership Tricolor spotlight banks' risk controls in opaque credit market, where complex loans have made it harder to gauge exposure
** SPDR S&P Regional Banking ETF KRE.P down 2.3% after 8.3% drop in previous two sessions
(Reporting by Joel Jose in Bengaluru)
((mailto: joeljose@thomsonreuters.com))