Lister said market watchers would be paying close attention to tomorrow's meeting between US President Donald Trump and North Korea's leader Kim Jong Un in Singapore, and meetings of the US Federal Reserve and European Central Bank later in the week.
"We'll probably see interest rates rise in the US, and in Europe they will in all likelihood give some clues about when they'll pare back their stimulus. People probably are holding fire a bit ahead of those various events."
A2 Milk Co led the index, up 3 per cent to $11.85.
"It was the top performer last week, up about 10 per cent, so it's continuing to recover some of the ground it lost last month," Lister said.
Auckland International Airport rose 1.8 per cent to $6.79, Freightways gained 1.2 per cent to $8.30, and NZX advanced 0.9 per cent to $1.14.
Mercury New Zealand was the worst performer, down 2.2 per cent to $3.32, while New Zealand Refining Co dropped 1.9 per cent to $2.53 and Metlifecare declined 1.8 per cent to $6.17.
Outside the benchmark index, Tegel Group Holdings rose 0.8 per cent to $1.20. The poultry group posted a 24 per cent drop in annual profit and recommended shareholders accept a $437.8m takeover offer from Philippines poultry company Bounty Fresh Foods.
"It wasn't a great result but it was secondary to the target company statement," Lister said. "When there's a takeover happening it overwhelms what's happening on the earnings front."