The NZX 50 climbed 145 points, or 1.1%, to close at 13,763 on Monday, extending gains from the previous session and hitting a record high, mainly buoyed by gains in the consumer staples, financials, technology, and healthcare sectors.
The broader index tracked a rise in US futures as Wall Street looked to extend its rally after the Dow Jones posted a record-setting week.
Easing oil prices also fueled sentiment as inflation concerns subsided, reducing expectations of an interest rate hike.
The rally was also supported by easing concerns about a Fed rate hike following the release of the jobs data last week, while traders anticipated the release of the Fed's meeting minutes due this week.
However, traders remained cautious ahead of the RBNZ's monetary policy decision on Wednesday, with the market expecting the central bank to raise its policy rate by 25 bps to 2.5%.
A2 Milk gained 2.8%, Ebos Group climbed 2.7%, Infratil rose 2.0%, and Fisher & Paykel increased 1.6%.