The Nasdaq led declines, with shares of Nvidia down after rising in the previous session, when the chipmaker said it plans to invest up to $100 billion in OpenAI. Amazon.com, Microsoft and Apple also were lower, while shares of AutoZone were down after it reported fourth-quarter profit that missed estimates. In comments Tuesday, Powell offered little hint of when he thinks the Fed might next cut interest rates. The Fed last week cut rates for the first time this year and indicated further cuts may be comin ...