The Australian currency on Friday finished flat in contrast to volatile trading earlier in the week as investors turned cautious before a US jobs report that could make or break the latest tentative improvement in risk appetite.

At 5pm (AEST) on Friday, the domestic dollar was changing hands at $US0.9080/84, an increase from Thursday's finish of $US0.9072/75, but down from an early $US0.9122 peak during the trading day.

The Aussie had a subdued trading day after a volatile week, according to Commonwealth Bank currency strategist Joseph Capurso.

"In terms of the week that was, it was pretty volatile and we're going to have a pretty bumpy ride over the next seven or eight days."

"It's been a pretty boring day."

The currency benefited in recent days from upbeat domestic and global data than countered some of the market's worst fears of a world slowdown.

National accounts data during the week showed the domestic economy grew by an unexpectedly rapid 3.3 per cent for the year to June.

Mr Capurso said the data led him to forecast a bullish statement from the Reserve Bank of Australia following its monthly board meeting and subsequent interest rate decision next Tuesday.

He said market expectations were for the RBA to hold the cash rate steady at 4.5 per cent. Many economists also do not expect a rate hike.

Market attention today was on key US jobs data during the offshore session, Mr Capurso said.

Dealers were wary in the much anticipated non-farm payrolls data for August due from the US Department of Labour.

The jobless rate is expected to rise marginally to 9.6 per cent from 9.5 per cent the previous month, and 105,000 jobs are expected to have been lost in August.

Mr Capurso predicts the private sector employment component of the US series to have the most effect on markets.