Australian shares have tumbled on the back of a resumption of US-China trade tensions, stoking worries about global growth and tech company valuations.
US stocks closed lower overnight as investors, deprived of economic data resulting from the shuttered government, looked to secondary indicators and remarks from US Federal Reserve officials for clues.
Wall Street's three major indexes closed a choppy session higher overnight, marking quarterly and monthly gains - even as investors braced for a US government shutdown.
Australia's share market has handed back early gains after the Reserve Bank hinted investors might have to wait longer for the next reduction in borrowing costs.