US stock futures edged lower Sunday evening, signaling a potential cooldown after the S&P 500 (^GSPC) wrapped up its longest winning streak in over 20 years. Futures attached to the S&P 500 (ES=F) sank 0.7%, while Dow Jones Industrial Average futures (YM=F) trickled down 0.6%. Futures tied to the Nasdaq (NQ=F) slipped 0.6%. CME –