The volume of trading on New Zealand's share market continued to gain in March, though the value of activity fell for a fourth month.

The level of activity on the NZX grew for an 18th month in February, though the value of transactions was lower than the same month last year.

The NZX will run out of steam unless companies, particularly the larger ones, can take advantage of the stronger economy, writes Brian Gaynor.

Contact Energy reported a 5 per cent improvement in earnings with improved sales and lower wholesale electricity prices.

The movie The Wolf of Wall Street is having an impact on market regulation, particularly in the United States.