Asian markets fell Wednesday following a rout on Wall Street, as investors were bombarded by a "perfect storm" of problems that erased the positivity seen at the start of the week.

The glum mood overshadowed hints from Donald Trump at more time to resolve the China-US trade row, as well as soothing comments from China about their desire to push on with a weekend agreement between the world's top economies.

Trading floors are awash with uncertainty over the agreement Mr Trump hammered out with Xi Jinping to much fanfare - and an initial market rally - in Buenos Aires, with little clarity emerging and the US president shifting his tone.

While he hailed the deal at first, on Tuesday he warned on Twitter "remember, I am a Tariff Man", adding "When people or countries come in to raid the great wealth of our Nation, I want them to pay for the privilege of doing so".

Then, in another tweet he left open the door to an extension of the agreement's 90-day timeline to end the row.