Australian equities suffered a broad retreat on Tuesday, with the S&P/ASX 200 closing down 1.8% at 7,841 points, as disappointing Chinese manufacturing data sent shockwaves through commodity-linked stocks and rattled investor confidence across the Asia-Pacific region. The selloff was led by Macquarie Group, which shed 3.2%, and mining giant BHP, which fell 4.1% to its lowest level since late January, as traders unwound positions built on hopes of a Chinese economic recovery.

China's National Bureau of Statistics released its official Purchasing Managers' Index for March on Tuesday morning, recording a reading of 48.6 — below both the 50-point expansion threshold and the consensus forecast of 49.8. The data signalled a contraction in factory activity for the second consecutive month, stoking fears that Beijing's stimulus measures have failed to generate durable momentum in the world's second-largest economy. Iron ore futures on the Dalian Commodity Exchange dropped 3.4% in response, compounding pressure on Australian miners.

Rio Tinto and Fortescue also posted heavy losses of 3.7% and 5.0% respectively, while energy producer Woodside Energy slid 2.3% amid softer crude and LNG price signals out of Asia. The broader materials sector fell 4.2%, its steepest single-session decline since October 2025. Morgans analyst Claire Dawson, who had flagged select ASX resources plays as undervalued just days earlier, acknowledged the data represented a "near-term headwind" but maintained longer-term price targets on names including South32 and Mineral Resources.

The Australian dollar fell in tandem, dropping 0.7% to US$0.6312, its weakest level in three weeks, as markets recalibrated expectations for commodity export revenues. The Reserve Bank of Australia, which held its cash rate steady at 3.85% at its most recent meeting, is not scheduled to convene again until late April, leaving currency markets to absorb the shock without a domestic policy buffer. Traders are now pricing a slightly elevated chance of a rate cut at the May meeting, according to overnight indexed swap data compiled by ANZ.

Market strategists at Commonwealth Bank and Westpac both issued notes on Tuesday afternoon cautioning clients against near-term overexposure to China-linked sectors. "The PMI print removes a key pillar of the bull case for Australian resources into the second quarter," wrote Westpac senior economist Matthew Hassan. "Until Beijing signals a more credible and targeted fiscal response, volatility in the materials and energy complex is likely to persist." The financials sector also came under pressure, with all four major banks finishing lower as risk appetite deteriorated across the board, leaving few safe havens on the bourse outside gold stocks, which edged up 0.9% as spot gold held above USD $2,980 per ounce.