AAP

Western Australia's unemployment rate fell 0.1 percentage points in January to be 6.5 per cent in seasonally adjusted terms, although the state now has the worst unemployment rate in the nation.

Diversified miner South32 has posted a sharp jump in half-year underlying earnings, thanks to ongoing cost reductions and stronger coal and manganese prices.

Wall Street pushed further into record-high territory, with the S&P 500 notching a seven-session winning streak, helped by a round of robust economic data and ongoing optimism that President Donald Trump will cut corporate taxes.

The Australian dollar is higher against its US counterpart and the yen and euro, performing strongly following positive earnings reports.

US crude prices have slipped in choppy trade, even as record high US crude and petrol inventories fed concerns about a glut.

Gold has risen as the dollar comes off its highs, shrugging off earlier pressure from stronger-than-forecast US inflation and retail sales that added to expectations for near-term US interest rate rises.

Strong investor demand for financial stocks, thanks to Commonwealth Bank's record first-half profit, has pushed the share market to its highest level since mid-2015.

The WA Liberals have pledged to raise the payroll tax threshold by $50,000 from next year, and have promised not to raise taxes or bring in new ones if re-elected, in contrast with Labor and despite the state's record debt and deficit.

Commonwealth Bank of Australia is lifting some of its mortgage rates as it tries to rein in stubbornly high investor lending growth and keep on the right side of the regulator.

Origin Energy has flagged a hit to profitability a day ahead of its half-year earnings, announcing it will take a $1.9 billion impairment charge against the value of some of its major assets, including the Australia Pacific LNG project and its Browse Basin gas fields.

Mike Fitzpatrick has resigned after a 10-year stint as AFL chairman and will be replaced by fellow commissioner Richard Goyder.

Seven West Media appears to have put a value of $16.9 million on The Sunday Times newspaper and Perth Now website, as the publisher and broadcaster posted a sharp drop in first-half net profit and dividends, and sought to direct attention away from its ongoing battle with CEO Tim Worner's former lover.

Wesfarmers is considering a spin-out of its profitable Officeworks business, which contributed to strong earnings growth for the Perth-based conglomerate in the first half alongside Bunnings and Kmart.

The Australia share market has risen sharply, with gains broad based on the back of solid first-half corporate earnings reports.

US stocks were little changed, with the "Trump rally" pausing ahead of a testimony by Federal Reserve Chair Janet Yellen that will be scrutinised for clues on the timing of the next interest rate hike.

The Australian dollar is lower against its US counterpart which reached a three-week peak against a basket of currencies.

Oil has settled slightly higher, although rising supply from US shale output limits enthusiasm about an OPEC-led effort to cut global output.

The Australian share market has lost earlier gains to close lower amid a sell-off in the healthcare sector and weakness from Asian markets.

The Nationals WA have preferenced the Greens ahead of their Liberal alliance partners on the ticket for two upper house regions in next month's state election, including Liberal Agriculture & Food Minister Mark Lewis.

Woodside Petroleum executive vice-president Lawrie Tremaine is jumping ship to become Origin Energy's new chief financial officer.

The Australia share market is heading towards the key 5,800 mark, thanks to strong investor demand for resource, healthcare and financial stocks after Wall Street hit record highs.

The Australian dollar is lower against its US counterpart which has risen against a basket of currencies on re-ignited hopes of a US Federal Reserve interest rate rise.

Gold prices have slipped as the US dollar rises and global equities climb, but political and economic uncertainties in the United States and Europe are expected to provide support for now.

Oil has fallen by about 2 per cent, the most since mid January, as a stronger dollar and signs of rising US crude output pressured prices while an OPEC report showing high compliance with last year's production-cut deal underwhelmed investors.

Seven West Media has secured an interim injunction against chief executive Tim Worner's former lover as it seeks to stop her releasing what it says are confidential documents she should not possess.

Some encouraging company earnings reports, a positive lead from US markets and higher commodity prices have helped lift the Australian share market by about 0.7 per cent to its best close in a month.

Strong sales of computers, cameras and home appliances have helped drive JB Hi-Fi's half-year profit up by nearly 16 per cent to $110.4 million.

Newcrest Mining will pay its first interim dividend in four years after more than doubling first-half profit on the back of higher prices and increased gold and copper production.

The Australia share market has gained ground, thanks to investor demand for growth stocks, including Rio Tinto, BHP Billiton and Woodside Petroelum, after Wall Street hit record highs.

The Australian dollar is higher against its US counterpart as the price of iron ore lifts.

Gold has steadied, but remains below this week's three-month top as the US dollar and Treasury yields came off their highs after the currency initially jumped on US President Donald Trump's promise of a major tax announcement.

Oil prices have risen after reports that OPEC members deliver more than 90 per cent of the output cuts they pledged in a landmark deal that took effect in January.