Wall Street edges lower as energy sector weighs

The S&P 500 and the Dow closed slightly lower on Monday, as a drop in oil prices dragged down energy stocks, while tech names Apple and Alphabet helped lift the Nasdaq to its highest close in over a year. The S&P 500 had hit a record high earlier in the session, but was unable to hold gains as U.S. crude slumped to below $40 a barrel, its lowest level since April, before settling at $40.06. "Oil has once again re-emerged as a real driver of how investors are gauging the trend for equitie