He was unable to make any further comment on the matter.
Former Northland Port Corporation chairman Mike Daniel, whose family trust owns 500,000 Lyttelton Port shares, has said 5000 of his shares in the port company were sold before trading was halted and he wanted the trades cancelled.
"It leaves a dirty taste in your mouth," he said this week.
Daniel's lawyer, Chapman Tripp partner Roger Wallis, has sent a letter to NZX that argues that the exchange operator does have the power to reverse the trades.
The letter goes on to formally request that the trades between 2.24pm and 2.57pm be cancelled.
The NZX yesterday reiterated its statement that it did not intend to reverse the trades.
"We do not believe there was any breach of NZX's participant rules," the exchange operator said. "As NZX's investigation is ongoing, further action may be taken if evidence of a breach of NZX rules is identified. NZX remains in dialogue with the market participants to further understand and if required reach a satisfactory resolution regarding these trades."
NZX said all information in relation to Lyttelton Port was available to all market participants and investors at the same time on Friday.