"It's not just New Zealand - it's central banks around the world that have had an impact on equities," said Matt Goodson, managing director at Salt Funds Management.
"There are risks that we have reached a quite extreme valuation level."
Cinema software analytics firm Vista Group International, which generates most of its income overseas, was the best performer in the quarter, up 30 per cent at $4.88, while A2 Milk rose 28 per cent to $14.31. Meridian at $4.185 and Genesis at $3.22 were up 28 per cent and 24 per cent respectively, while telecommunications network operator Chorus gained 22 per cent to $5.90 in the March quarter.
Greg Smith, head of research at Fat Prophets, said the low rate environment and the weaker currency was a boon for exporters, who generate bigger returns from export receipts when the kiwi declines.
Exporter Sanford led the market higher today, up 3.8 per cent at $7.06, while Pushpay Holdings rose 3.6 per cent to $3.21. Contact Energy gained 3.3 per cent to $6.94 and utilities software developer Gentrack rose 3.2 per cent to $4.90.
Spark New Zealand was the most traded stock with a volume of 4.4 million shares. It fell 0.5 per cent to $3.80 today. The telecommunications company today said it was seeking a content partner for its Lightbox streaming service.
Smith said content has become increasingly expensive as a growing number of streaming players vie for broadcast rights. However, Spark's pursuit of a partner was going against the grain, where other media groups sought to lock up control of those shared online platforms. Australia's Nine Entertainment Co's acquired Stan partner Fairfax Media Group last year.
Sky Network Television, which has been shedding subscribers in that environment, fell 1.5 per cent to $1.29 on a volume of 1.6 million shares.
Of other companies trading on volumes of more than a million shares, Z Energy slipped 0.2 per cent to $6.26, Kiwi Property Group rose 0.3 per cent to $1.485, Air New Zealand rose 2.6 per cent to $2.535, and Precinct Properties New Zealand gained 2 per cent to $1.56.
Kathmandu Holdings fell the most on the day, down 2.2 per cent at $2.24.
Smith said next week's increase in the minimum wage will be a double-edged sword for retailers. On one hand it boosts consumer spending by putting more money into the hands of households, but on the other, it lifts the costs for typically low-paid industries.
Outside the benchmark index, clothing chain Hallenstein Glasson Holdings rose 4.2 per cent to $4.69 after reporting a 5.9 per cent increase in first-half profit, primarily on lower costs.