U.S. stock index futures turned sharply lower Tuesday morning.
At around 4:50 a.m. ET, Dow futures fell 117 points, indicating a negative open of more than 134 points. Futures on the S&P and Nasdaq were both slightly lower.
Market focus is largely attuned to global trade developments, with five days to go before Washington is poised to impose even more tariffs on Chinese goods.
Dec. 15 is the date when tariffs on another $156 billion in Chinese goods would go into effect.
The world's two largest economies have imposed tariffs on billions of dollars' worth of one another's goods since the start of 2018, battering financial markets and souring business and consumer sentiment.
Investors will also closely monitor the Federal Reserve, with policymakers at the U.S. central bank expected to hold interest rates steady at a two-day meeting set to conclude on Wednesday.
On the data front, the National Federation of Independent Business (NFIB) survey for November will be released at 6 a.m. ET. Revised figures for third-quarter productivity and third-quarter unit labor costs will follow slightly later in the session.
In corporate news, AutoZone, Supply Holdings and Designer Brands will report earnings before the opening bell.
Dave & Buster's, GameStop and Ollie's Bargain Outlet will report their latest quarterly earnings after market close.