By Shashwat Chauhan and Kanchana Chakravarty (Reuters) -Futures tied to Wall Street's main indexes fell marginally on Tuesday as investors awaited commentary from Federal Reserve officials through the day to assess the impact of U.

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.

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,

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

(Reuters) -U.S. stock index futures slipped on Thursday as a rally fueled by the U.S.-China tariff truce appeared to ease, while UnitedHealth fell after a report of a DoJ investigation into the health insurer.

Asian shares are lower after Moody's Ratings downgraded the sovereign credit rating for the United States. U.S. futures and the dollar also slipped.