US stock futures wavered after investor optimism largely persisted for another day despite growing warnings that relief over trade developments could be short-lived.

Futures on Wall Street are currently pointing to a negative start to Tuesday's trading session, even as investors brushed aside concerns arising from the Moody's downgrade. Monday's session saw the resultant gap-down from the downgrade being swiftly bought into,

Stock traders knew it was an ugly setup entering Monday, with futures lower in premarket action and Treasury yields racing higher after Moody’s downgraded the US debt at the very end of last week.

U.S. stock futures point to a lower open, a day after stocks made a comeback to close higher despite Moody's stripping the U.S. of its top AAA rating.

By Shashwat Chauhan and Kanchana Chakravarty (Reuters) -Wall Street futures fell and Treasury yields rose on Monday after Moody's downgraded the U.S. sovereign rating, sharpening focus on the country's mounting debt.

Stock index futures fell sharply on Monday after Moody’s Ratings decision to strip the U.S. of its last remaining top-tier credit score. S&P 500 futures (SPX) -1%, Nasdaq 100 futures (US100:IND) -1.3%,