Brexit angst is going global. As the domestic debate becomes increasingly rancorous, finance officials around the world are girding themselves for turmoil next week. The U.S. Federal Reserve kept interest rates on hold yesterday partly on concern about market fallout from a Leave vote. And Japan’s central bank refrained from adding more stimulus to its economy as “geopolitical risks” fuel volatility. While the campaign now has the occasional feel of a pantomime, the outcome has the world’s most powerful people on edge. — JOHN FRAHER