An academic says New Zealand's local stock exchange needs to step up its game because the share price for dual-listed New Zealand companies is increasingly being led by the Australian stock market.
Last week the Australian Securities Exchange visited New Zealand for the fifth time in six months amid a raft of large New Zealand companies choosing to list on both the NZX and the ASX.
Bart Frijns, a finance professor at AUT University, said research he had done between 2002 and 2012 found the percentage of time the price for dual-listed New Zealand companies moved first on the ASX had jumped from 15 per cent in 2002 to 50 per cent last year.
"The ASX is becoming a more important market in terms of price. It is a concern. If the price discovery is better on the foreign market why would people still trade on the local market?"
Frijns said it was a problem that Canada also faced as many of its companies choose to dual-list on the United States stock exchanges.