The owners of a winning $22.4m Powerball lotto ticket bought from Manukau Pak'nSave have yet to claim their winnings.

There are times when investors put money into stocks or other investments without understanding the risks.

Extra profit attributed to two major prize draws which prompted optimistic punters to buy tickets in record numbers.

A Newcastle man who won a $2.5 million (A$2 million) Lotto prize avoided claiming his winnings for seven months until he could cope with the win.

SkyCity Entertainment is betting on a more benign regulatory environment now that National is in power.