Wall Street was a sea of red on Monday as China ramped up its arsenal in the continuing trade war between the US and China.

The Dow Jones industrial average plunged by more than 750 points in afternoon trading Monday in response to China allowing its yuan to sink to an 11-year low against the US dollar — a move that makes Chinese imports cheaper.

The Dow started the day down more than 500 points and lost more than 758 points before 1 p.m. to trade at 25,726.05. Other stock indices, including the S&P 500, was off more than 2% while the Nasdaq fell more than 4% during Monday’s selloff.

“It’s called ‘currency manipulation,’” President Trump said in a tweet Monday. “Are you listening Federal Reserve? This is a major violation which will greatly weaken China over time!”

Trump was referring to China allowing the yuan to fall below the 7-per-dollar level on Monday for the first time in more than a decade. The 1.4% drop in the yuan comes just days after Trump angered China with plans to tariff $300 billion of Chinese imports at 10% starting next month.

US officials say a weakened yuan gives Chinese exporters an unfair advantage in foreign trade.

While China does not import as many goods from the US as the US does from China, the country has shown that it has other levers to pull besides tariffs in the burgeoning trade battle.

There are other measures China could take, including halting US farm imports and hampering US business activity in China.

“They can make it much more difficult for US companies to sell goods and services in China,” Quincy Krosby, chief market strategist at Prudential Financial, told The Post.

“Any hopes of a quick resolution with China are fading quickly,” Ryan Detrick, senior market strategist at LPL Financial, said Monday.

Apple was one of the weakest stocks on the Dow, falling 4% in early trades. Caterpillar and Boeing, which both rely heavily on business in China, saw their shares off more than 2% on renewed trade tensions.

“The Great China Trade Deal evaporated before our eyes last week and investors should stop hoping it back into existence,” Christopher Smart, head of the Barings Investment Institute, said in a note Monday.