Strategists at Citigroup have advised investors to sell U.S. stocks if the upcoming election results in a Republican sweep, particularly if Donald Trump secures a victory. Despite a current bullish sentiment among investors leading up to the election, Citigroup analysts believe that a clean sweep for the Republican party would signal an opportune moment to sell. The firm noted that stocks are currently experiencing 'near-euphoric sentiment,' suggesting that the election could provide a chance for a market pullback.