World shares are mixed after Wall Street trims losses Updated 17 mins ago European shares have opened lower after a mixed trading session in Asia. U.S. futures slipped while oil prices advanced. Traders are looking ahead for cues about U.S. monetary policy from a meeting of central bankers in Jackson Hole, Wyoming. Federal Reserve chair Jerome Powell is due to speak at the conference on Friday. A survey showed Japan’s factory activity remained in contraction in August for a second month, pressured by higher tariffs on exports to the U.S. On Wednesday, the S&P 500 dipped 0.2% Wednesday after trimming a loss that reached 1.1% earlier in the day. The Dow Jones Industrial Average added 16 points, and the Nasdaq composite fell 0.7%.

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