US stock index futures plunge as Trump threatens 25% tariffs on Europe over Greenland. Nasdaq 100 erases 2026 gains, breaking key support levels.

U.S. stock futures have skidded after U.S. President Donald Trump threatened to slap a 10% extra tariff on imports from eight European countries due to their opposition to his desire to take control of Greenland.

Stock index futures sank as Wall Street returned to trading Tuesday as the standoff between the U.S. and Greenland continued to heat up. S&P futures (SXP) -1.6%, Nasdaq 100 futures (US100:IND) -1.8% and Dow futures (INDU) -1.

It is often the case that U.S. equity index futures rally off the lows following a session when American investors were on holiday. The buy-the-dip mentality kicks in, particularly if the reason for the initial retreat is geopolitical.

Stock futures saw a slight upward movement on Tuesday night after major averages in the US clocked their worst day in three months.

Futures steadied after Wall Street’s worst session in three months, as markets fretted over Trump’s plans to acquire Greenland despite opposition from European leaders. S&P 500 Futures rose 0.1% to 6,838.0 points by 18:27 ET (23:27 GMT). Nasdaq 100 Futures rose 0.1% to 25,152.75 points, while Dow Jones Futures rose 0.1% to 48,727.0 points.

European shares mostly fell and U.S. stock futures skidded Monday after U.S. President Donald Trump threatened to slap a 10 percent extra tariff on imports from eight European countries because they oppose having America take control of Greenland.

US futures fell during the Asian session amid rising US-EU trade tensions, but resilient US data and AI-driven earnings optimism kept a bullish bias intact.

U.S. stock futures slid on Monday after President Donald Trump threatened to slap extra tariffs on eight European nations until the U.S. is allowed to buy Greenland, pushing the dollar down on the safe-haven yen and Swiss franc.