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Second largest U.S. public pension fund files suit against Wal-Mart
New York -- The California State Teachers' Retirement System (CalSTSR), the second largest U.S. public pension fund, has filed a lawsuit against current and former Wal-Mart Stores’ executives and board members over mishandling of allegations that officials knew about a bribery campaign in Mexico and covered it up. The fund holds more than 5.3 million shares of Wal-Mart.