Australian shares are poised to fall on Monday, tracking weakness in global equities amid renewed uncertainty over US trade policy and political instability across parts of Asia, as investors digest a US court ruling deeming President Donald Trump's tariffs illegal.

Last Friday, the S&P 500, the Nasdaq Composite, and the Dow Jones Industrial Average fell 0.6%, 1.2%, and 0.2%, respectively.

In the macroeconomy, Australia's manufacturing sector expansion accelerated in August due to increased new orders, supported by a renewed growth in exports, leading to a jump in production, according to a survey by S&P Global published Monday.

The building approvals and business indicators reports are due at 11:30 am Sydney time.

In corporate news, Mac Copper (ASX:MAC) has received 98.43% shareholder approval at the court meeting for its proposed acquisition by Harmony Gold, with final court sanction scheduled for Oct. 9, according to a Monday Australian bourse filing.

Meridian Energy (ASX:MEZ, NZE:MEL) opened an offer of up to NZ$250 million of unsecured, unsubordinated, fixed-rate green bonds, maturing March 11, 2032, according to a Monday filing with New Zealand and Australian bourses.

Australia's benchmark index fell 0.1% or 6.9 points to close at 8,973.10 on Friday, Aug. 29.