BUZZ-US big banks slide amid selloff sparked by uncertainty over consumer spending

** Shares of economy-sensitive large-cap U.S. banks fall in volatile afternoon trading

** Citigroup C.N down 3.4%, JPMorgan Chase JPM.N falls 4.6%, Goldman Sachs GS.N slides 5.1% and Morgan Stanley MS.N drops 5.4%

** Bank of America BAC.N and Wells Fargo WFC.N down between 1.3% and 2%

** The S&P 500 Banks Index .SPXBK recorded its biggest single day fall since mid-December

** A weaker-than-expected sales and profit forecast from Walmart WMT.N, the largest U.S. retailer, ignited worries about consumer spending

** The company on Thursday said it was being cautious while navigating an uncertain geopolitical landscape

** Uncertainty over the inflationary impact of President Trump's tariffs and immigration policies has rattled some investors

** Brokerage Morgan Stanley said in a note that tighter immigration policies could keep the Federal Reserve in its currently restrictive stance for longer