Hedge funds posted their first losing month of the year in June, hurt by the poor performance of event-driven and macro strategies. The funds on average dropped 0.4 percent last month, according to Hedge Fund Research Inc.’s asset weighted composite index. They gained 2.4 percent in the first six months of the year, the strongest half-year performance since 2014. The industry had been gaining steam this year after a lackluster 2016 until it hit a wall in June. Macro funds had the poorest performance of any strategy, posting a 1.6 percent loss. Event-driven strategies, which had been doing well, dropped...