The New Zealand sharemarket is expected to remain volatile over coming weeks as investors take profits amid jitters over the US Federal Reserve turning off its money tap.

Conservationists fighting a decision to allow an Australian mining company to dig for coal on the West Coast's Denniston Plateau have suffered a major setback today.

Shares in the newly-listed technology firm SLI Systems are up a further 25 per cent today.

The Denniston Plateau deal shows that National and the mining industry have learned their lesson from their last attempt to mine on conservation land.

Shares in the newest member of the NZX, SLI Systems, have jumped 18.67 per cent from its initial public offer price.

Greymouth Petroleum director Jim Sturgess must take primary responsibility for the "destruction of trust" between himself and two other board members at the oil and gas company.

In terms of time spent and where expertise sits, it is rational to leave the running of that business to the board and management, writes Susan Watson.

A High Court hearing gets underway in Christchurch this morning as environmental groups try more ways to stall mining on the Denniston Plateau.

Newmont Waihi Gold hopes to start work on its controversial $1 billion Correnso underground mine around the middle of next year.

Auditor General Lyn Provost says she will not carry out an inquiry into what led Solid Energy to the brink of collapse this year.

Bathurst Resources has cleared another hurdle in its struggle to start coal mining on the Denniston Plateau near Westport but still needs the blessing of courts and faces tough market conditions.

Ryman Healthcare's share price is making some in the market feel nervous that it is hitting bubble territory.

Solid Energy ex-chairman John Palmer opposed Treasury's wish to appoint an independent advisor to the company's board last year.

Writing in the journal Nature Geoscience, the scientists, backed by the Japan Agency for Marine-Earth Science and Technology, said rare earth minerals had been found in mud on the ocean floor.

The US hedge fund manager renowned for shaking up Yahoo! has set his sights on Sony, proposing that the Japanese electronics giant spin off up to 20 per cent of its movie, television and music division

Local market players believe the $2.50 per share price for Mighty River Power is a pretty good result...

Mighty River Power stock may be in demand when it lists tomorrow from international buyers who are faced with low yields in their own markets.