Figuring out a price tag for some of the world's biggest and rarest diamonds can be as difficult as finding them.

New Zealand shares rose to a record as A2 Milk Co continued its strong rally, with Westpac Banking Corp, Meridian Energy and Sky Network Television all advancing on light trading.

Maui natural gas pipeline has been sold to First State Investments.

The petrol pump war has moved up a gear with Z petrol stations entering the fray and slashing prices.

Kiwis planning to fill up their petrol tanks for summer road trips can save up to 20 cents a litre off their fuel today.

Tony Falkenstein, chairman of Just Water responds to Tim Bennett's article: 'NZ's chance to grasp lost opportunity'.

What's in store for 2016? We'll probably see the first bitcoin company valued at more than $1 billion.

Fund managers say the poor performance of many recent sharemarket floats has impacted investor appetite for new listings.

OPINION: The savings you can make shopping around for insurance are certainly worth the hassle, writes Mary Holm.

Back in August, it would have been difficult to imagine the S&P/NZX 50 notching up yet another year of double-digit returns.

As the Prime Minister said, "It makes no sense to be calling for emissions restrictions on one hand while subsidising emissions on the other."

More than a few business leaders will be quietly enjoying the troubles of the world's first publicly-listed law firm, writes Christopher Niesche.

The company behind products like Maxigesic will be listed on NZX.

Pacific Edge widened its first-half loss, spending more on the roll-out of products across America.

Mark Lister talks shifts in currency and interest rates have dominated the investment landscape.

New Zealand shares rose to a new record close, led by a2 Milk Co as Australian investors continued to back growing demand for the milk marketer's infant formula.

Kathmandu hasn't been the only company courting shareholder discontent with questionable pay proposals.

Despite the carnage from the Paris terrorist attacks, world financial markets have been relatively resilient in the face of political change.

Shareholder showdown looming over plans to award more than $500,000 to new chief executive.

A shareholder showdown is looming over plans to award A$546,000 in performance rights to new Kathmandu chief executive Xavier Simonet.

One of Australia's largest real estate companies is looking to make its share market debut next month, giving the company a $307 million market value.

Fonterra boss Theo Spierings wasn't mincing his words this week when asked about rival Synlait Milk's moves to sell cut-price infant formula in China.

There are some fundamental issues with investing in ethical funds which retail investors should be aware of.

Oil may be king of the commodities, but its physical form is tough to come by.

Ticketing machines unable to process the imagery on the new notes.

Chicken producer Tegel is expected to launch a transtasman public share offer early next year.