Global stocks are headed for their best second-quarter performance in six years, with the MSCI All-World index rising almost 14% to record highs. The rally has been powered by a boom in artificial intelligence stocks, pushing the S&P 500 up 14% and the Nasdaq up 20%. The dollar has been the standout winner in foreign exchange, gaining 1.4% against major currencies and driving the yen to a four-decade low around 162.23 per dollar. Gold suffered its largest quarterly fall in more than a decade as investors repriced U.S. interest rate expectations from cuts to potential hikes. Federal Reserve Chair Kevin Warsh is set to address the ECB's annual meeting in Sintra on Wednesday, with some economists seeing a chance of a rate hike as soon as July.