The stock market operator is aiming to raise a total of $44m to fund acquisitions.
Police began blockading off roads around parliament earlier this morning with huge concrete blocks, triggering scuffles with protestors.
While more expensive petrol prices showed some of the steepest increases, prices for other energy sources declined.
Wellington's biggest social housing project has kicked into gear, at a site 'reclamation' cost of $50m, aiming to bring an additional 300 houses on stream in the city fringe.