Global Market Today: Asian shares slip as US stock futures dip ahead of Warsh’s Jackson Hole speech

Futures for the Nasdaq 100 Index fell 0.3% and those for the S&P 500 Index retreated 0.2% as initial enthusiasm about the artificial intelligence trade following Nvidia Corp.’s bullish outlook waned. Sentiment was weighed down by Marvell Technology Inc., which fell more than 7% in extended trading…