NZX's effective tax rate was 43 per cent in the first half, higher than the statutory rate of 28 per cent, due to the Ralec expenditure not being tax-deductible, it said.
"We are pleased the Ralec trial and associated costs, which weighed on our result, are behind us now," chief executive Tim Bennett said.
"We continue to deliver against our strategic objectives to grow the business and the markets for the long term. We are continuing to see a good pipeline of small to medium sized listing candidates, while debt raising activity is expected to continue at levels above historical averages."
NZX reiterated its expectation for annual earnings before interest, tax, depreciation and amortisation to be in the range of $22.5 million to $26.5 million, a forecast it gave in February, subject to market outcomes.
Revenue gains came from increased funds under management, the launch of new exchange-traded funds (ETFs) and NZX's acquisition of investment platform Apteryx, now called NZX Wealth Technologies, in the second half of 2015, it said.
We are pleased the Ralec trial and associated costs, which weighed on our result, are behind us now.
Market earnings grew 10 per cent to $19 million in the first half, while fund services earnings dropped 78 percent to $358,000 and agri dropped 37 percent to $291,000. Fund services earnings fell because NZX Wealth Technologies and some of the ETFS are losing money in an effort to build critical mass, NZX said. The agri decline was due to 11 percent lower advertiser spending in the dairy downturn.
Overall listing fees rose 6 percent to $4.5 million, while initial listing fees jumped 382 percent to $960,000, which NZX said was "consistent with a four-fold increase in the value of new equity listed coupled with a significant increase in new debt listings."
The board declared an interim dividend of 3 cents per share, with a September 2 record date, payable on September 16.
The shares last traded at $1.04, having declined 2.8 per cent so far this year.
See a full results presentation here: