A senior Chinese official said on Tuesday it is difficult to proceed with trade talks with the United States while Washington is putting “a knife to China’s neck”, a day after both sides heaped fresh tariffs on each other’s goods.

U.S. stock index futures fell into negative territory ahead of Monday’s open, as the trade war between the U.S. and China escalated with further tariffs.

U.S. stock index futures posted solid gains ahead of Friday’s open, extending the positive run seen in the previous session on Wall Street.

U.S. stock index futures pushed out slight gains ahead of Thursday’s open, building upon the strong session seen on Wall Street yesterday.

U.S. stock index futures eked out minor gains ahead of Wednesday’s open, lifted by positive sentiment seen in markets overseas.

By imposing taxes on an additional $200 billion in Chinese goods, President Donald Trump has intensified a battle of wills between the world’s two largest economies — and the outcome is far from certain.