By Dan Weil U.S. stock funds suffered redemptions of $19 billion in the week ended April 20, the biggest since December. Stocks have struggled so far this year, with the S&P 500 losing 10%. Commentary from Bank of America strategists indicates more losses may be on the way. Global equity funds saw on outflow of $17.5 billion in the week ended April 20, the worst week of the year, according to the strategists, citing EPFR data. U.S. equity funds suffered an outflow of $19 billion, the biggest since December. The outflow was $19.6 billion for U.S. large-cap stocks. “Everyone bearish, but redempt…