China's stocks and currency came under pressure as markets returning from a week-long break were greeted by a new trade dispute with the United States and ructions in the global artificial intelligence sector.

The first punches have been thrown between the United States and China in what could amount to a short-lived trade dispute with limited economic fallout or the start of yet another lengthy and painful trade war reminiscent of President Donald Trump’s first term.

While President Donald Trump has delayed levying tariffs on Canada and Mexico, the U.S. has officially implemented a 10% tariff on all Chinese imports. Just as we saw in Trump’s first term, China has responded with retaliatory tariffs,

A call between Trump and Xi Jinping hasn’t happened Tuesday, but might come Wednesday.

U.S. stock futures and the dollar fell on Tuesday, while Hong Kong shares slipped from two-month highs, as the U.S. and China went tit-for-tat on tariffs and raised the spectre of a broader, damaging trade conflict.

U.S. stocks are volatile after President Trump imposed tariffs on Canada, Mexico and China over the weekend. FOX Business is providing real-time updates on the markets, commodities and all the most active stocks on the move.