Protesters angry at inaction on climate change gained access to a private area of the stock exchange building on Wellington's waterfront on Monday morning.
About 50 protesters had been held back by a police line outside the building, but one small group managed to enter the building.
A spokesperson for the NZX says they got into a kitchen area shortly before 9am and were asked to leave, which they did. Trading was not affected by the protest.
The protesters told Radio New Zealand News they were angry at big business and political leaders for failing to take action to reduce the effects of global warming during the climate talks in Copenhagen.
A few blocks away another group unfurled a banner on the fifth storey of the Ministry of Foreign Affairs and Trade. The wording on the banner was critical of the dairy co-operative Fonterra.
One of the protesters using tree-surgeon equipment to hang from the side of the building, John Darroch, says MFAT is wrong to promote New Zealand dairy as clean and green.
Another protester, Clare Dann says market solutions such as carbon trading, an area NZX is involved in, will worsen greenhouse gas emissions, not reduce them.