David Paul Morris / Bloomberg / Getty Images Lyft shares soared after Google’s Waymo announced an expanded partnership to bring robotaxi service to Nashville starting next year, while shares of rival Uber slumped. Key Takeaways Major U.S. equities indexes were mixed at midday ahead of a highly anticipated decision on interest rates from the Federal Reserve. Shares of Workday surged after activist investor Elliott Investment Management announced a $2 billion stake. Nvidia shares slipped following a re ...