"We'll go along for the ride until that second week of August when we've got some of our own corporate news to latch onto."
With Apple, Amazon, Visa, Facebook and Alphabet - the parent of Google - all set to report this week, investors were watching closely to see if their high share prices were deserved.
"Lots of those big technology stocks that have driven the rally are announcing results over the next two or three days," he said.
"People are a little cautious and the question is: can those results live up to the expectations the share prices have factored in?"
The NZX50's two software stocks posted the day's biggest gains: Vista Group International rose 7 per cent to $1.37 and Pushpay Holdings rose 3.1 per cent to $8.00.
Lister said Pushpay was attracting some bargain hunters as the stock had slipped from its record.
"The stock was well north of $9 for most of June and then there was the sell down from one of the major shareholders," Lister said.
"People are happy to pick up a few shares cheaper than they have been, because operationally we've heard nothing but good news."
Cinema software company Vista had a similar trajectory, nearing $2 at the start of June before dropping as low as $1.20 in July.
Auckland International Airport posted the day's biggest decline, falling 1.6 per cent to $6.20.
Meanwhile, Air New Zealand rose 0.8 per cent to $1.32 and Tourism Holdings rose 1.8 per cent to $1.72.
Telecommunications company Spark New Zealand rose 0.5 per cent to $4.905, while internet utility firm Chorus dropped 0.5 per cent to $7.46.
Other utilities were also weaker. Genesis Energy fell 1.4 per cent to $2.85, Trustpower dropped 1.2 per cent to $6.70, Meridian Energy decreased 1.1 per cent to $4.70 and Contact Energy declined 1 per cent to $5.70.
Vector fell 1 per cent to $3.90. The lines company today announced a partnership with cloud-computing specialist Amazon Web Services to develop a new platform to manage consumer data for the energy industry in Australia and New Zealand.
Fisher & Paykel Healthcare, the NZX's largest company which has driven the local rally, fell 0.7 per cent to $34.85. A2 Milk Co rose 0.2 per cent to $20.75.
Argosy Property fell 0.4 per cent to $1.24. The company today said it expects to match last year's 6.35 cent dividend in the current financial year, on the strength of its resilience through the Covid pandemic and despite the challenges of the "economically weak" period.
Outside the benchmark, utility measurement firm ikeGPS said it will raise almost $20m of new equity after winning one of the largest communications infrastructure companies in the United States as a customer. Its shares were halted at 77 cents.