U.S. stock index futures were down on Tuesday, pulling back after a sharp rally fueled by a U.S.-China trade truce, as investors turned their focus to a key U.S. inflation reading that could shape the outlook for monetary policy.

Stock futures on Wall Street surged Sunday evening as the US cited "substantial progress" in trade negotiations with China, raising hopes of a potential deescalation in tensions between the world’s two largest economies.

Stock market futures in the U.S. surged on Monday as the U.S. and China agreed to temporarily de-escalate their trade war.