(Bloomberg) -- Bill Gross said he’s selling most of his regional bank holdings, three months after buying stocks including Western Alliance Bancorp and PacWest Bancorp in the wake of the March banking crisis.Most Read from BloombergPowell Has Stopped Handing Gifts to Wall Street on Fed DayHunter Biden Plea Deal in Limbo After Judge Questions TermsUK Billionaire Joe Lewis Charged in US With Insider TradingRolex, Patek Prices to Keep Falling as Supplies Remain High, Morgan Stanley SaysFed Set to R