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Growing distrust between the United States and China has slowed the once steady flow of Chinese cash into America, with Chinese investment plummeting by nearly 90% since President Donald Trump took office.

The falloff, which is being felt broadly across the economy, stems from tougher regulatory scrutiny in the United States and a less hospitable climate towards Chinese investment, as well as Beijing's tightened limits on foreign spending.

It is affecting a range of industries, including Silicon Valley startups, the Manhattan real estate market and state governments that spent years wooing Chinese investment, underscoring how the world's two largest economies are beginning to decouple after years of increasing integration.

"The fact that the foreign direct investment has fallen so sharply is symbolic of how badly the economic relationship between the United States and China has deteriorated," said Eswar Prasad, former head of the International Monetary Fund's China division.

"The US doesn't trust the Chinese, and China doesn't trust the US."

For years, Chinese investment into the United States had been accelerating, with money pouring into autos, tech, energy and agriculture and fuelling new jobs in Michigan, South Carolina, Missouri, Texas and other states.

As China's economy boomed, state and local governments along with US companies looked to snap up some of those Chinese funds.

But Trump's economic Cold War has helped reverse that trend.

Chinese foreign direct investment in the United States fell to US$5.4 billion in 2018 from a peak of US$46.5 billion in 2016, a drop of 88%, according to data from Rhodium Group, an economic research firm.

Preliminary figures through April of this year, which account for investments by mainland Chinese companies, suggested only a modest uptick from last year, with transactions valued at US$2.8 billion.

A confluence of forces appear to be at play. A slowing economy and stricter capital controls in China have made it more difficult for Chinese investors to buy American, according to trade and mergers and acquisitions advisers.

Trump's penchant for imposing punishing tariffs on Chinese goods and an increasingly powerful regulatory group that is heavily scrutinizing foreign investment, particularly involving Chinese investors, have also spooked businesses in both countries.

China, which has retaliated against US goods with its own tariffs, may also be turning off the investment spigot as punishment for Trump's economic crackdown.

Concerns about America's receptiveness to Chinese investment have been aggravated by a flurry of transactions that collapsed under heavy scrutiny from the Committee on Foreign Investment in the United States.

The group, which is headed by the Treasury Department, gained expanded powers in 2018 that allow it to block a broader array of transactions, including minority stakes and investments in sensitive technologies like telecommunications and computing.

Shortly after the new year, China's HNA Group took a US$41 million loss on a glass and aluminum Manhattan high-rise after US regulators forced it to sell the property because of security concerns about its proximity to Trump Tower, only a few blocks away.

In March, the Chinese owners of a gay dating app known as Grindr were told by regulators to find a buyer for the company. The Trump administration feared Beijing could use personal information as leverage over US officials.

Those interventions followed prominent cases earlier in Trump's term, such as Broadcom's quashed bid for Qualcomm and the sale of MoneyGram to a unit of the Chinese e-commerce giant Alibaba last year.