US STOCKS-Wall Street falls as Brexit vote becomes major fear
* May retail sales rise 0.5 pct vs estimated 0.3 pct
* Citigroup, JPMorgan among top losers on S&P 500
* Fed kicks off two-day policy meeting
* Indexes end down: Dow 0.33 pct, S&P 0.18 pct, Nasdaq 0.10 pct (Updates to close)
By Noel Randewich
June 14 (Reuters) - Wall Street dropped for a fourth straight session on Tuesday as central bank policymakers weighed the health of the U.S. economy and investors worried about an upcoming vote in Britain on whether to leave the European Union.
Investors launched a late-day rally but the major indices still ended with losses. The U.S. Federal Reserve began its two-day meeting to decide whether the U.S. economy has recovered enough to absorb an interest rate hike.
While traders have discounted a rate increase this month, they will parse Fed Chair Janet Yellen's comments on Wednesday for clues on the health of the economy and the trajectory of hikes.
Among banks that tend to benefit from higher interest rates, Wells Fargo and JPMorgan Chase took a hit and weighed most on the S&P 500. Continuación...