US Stock Futures Slide: S&P 500 Down 0.5%, Nasdaq 0.8%, Dow 0.3%

US markets opened with stock futures showing weakness as traders prepared for a new day of trading on Wall Street. Futures tied to the major indexes were in the red early in the session. S&P 500 futures were down about 0.5 %, Nasdaq futures declined around 0.8 %, and Dow Jones futures dropped roughly 0.3 %. These moves suggest investors were cautious ahead of key economic data and corporate earnings reports.