The political machinations around the electricity sector have definitely added an element of higher risk to the Mighty River Power float making it even harder for retail investors to make a call on buying into the soon-to-be-listed power company.

So far less than 10 per cent of those who bought into the Mighty River Power offer have pulled out as a result of the Labour/Greens electricity market overhaul proposal.

Half of those who intended to invest in Mighty River Power have changed their minds or are reconsidering, according to a Shareholders Association poll.

Both opposition parties will be hoping enough potential investors turn off the pending float so they can declare it a disaster, writes Fran O'Sullivan.

Investors should still consider buying into the Mighty River Power float despite the increased regulatory risk from Labour's proposed shake-up of the electricity market, according to one analyst.

Labour says its plan to bring down power prices is affordable despite losing out on state-owned power company dividends.

Uncertainty created by the Labour Party and Greens' plans for the electricity market helped drive the share prices of the main NZX-listed power generators sharply down yesterday.

The Government says it won't be able to say how many people have applied to buy shares in Mighty River Power until after the offer period has closed.

The proof will be in the pudding for the Government next week as the Mighty River Power share offer officially opens to the public on Monday. It's hard to know how many of the 440,000 people who pre-registered will buy shares.

Starbucks NZ owner Restaurant Brands says it isn't pulling the plug on the brand, but would sell for the right price.

Diligent Board Member Services faces breaching listing rules after the stock exchange regulator refused an application to waive its use of an American auditor.

More than 400,000 people have pre-registered their interest in buying Mighty River Power shares before the process closes at 5pm on Friday.

Shares in Mighty River Power are likely to cost between $2.36 and $2.75, according to estimates based on a raft of pre-marketing research reports released by major broking firms.

SkyCity Entertainment Group could be up for $500 million if it wins the right to build a new Gold Coast casino, cruise ship terminal and tourism project, an expert estimates.

The Government's partial asset sales policy will launch tomorrow with a $1 million advertising blitz to promote the sale of Mighty River Power shares.

More details are due today of the NZX listing of Mighty River Power whose float could have a short-term hit on the broader market.