"It's one of those things - stocks go up in escalators and come down in elevators," said James Smalley, director at Hamilton Hindin Greene. "The question is now is the People's Bank of China going to start pulling the trigger on stimulus?"
Momentum stocks dropped, led by Xero, the cloud-based accounting software firm, down 8.1 per cent to $13.80. A2 Milk declined 5.5 per cent to 69c. Pacific Edge, the biotech firm, fell 3.3 per cent to 59c.
"There's no anchor or earnings to link the share price or support it, it all just comes down to perception," Smalley said. "In an environment like this, where everyone is unbelievably, overly negative ... then those are the stocks that are a lot more susceptible to negative sentiment. Once sentiment really gets hold that can last quite a long time."
Spark New Zealand rose 0.5 per cent to $3.035, as investors flocked to the telecommunication provider, which produced an unexpectedly strong dividend forecast at last week's profit announcement.
Property investors and other defensive stocks fell to a lesser degree, Smalley said. DNZ Property Fund slipped 0.5 per cent to $2.15. Z Energy declined 0.4 per cent to $5.75. Property For Industry fell 1 per cent to $1.52. Precinct Properties New Zealand retreated 0.9 per cent to $1.155.
Chorus shares fell 4.6 per cent to a 6-month low of $2.625 after the telecommunications network operator reported a 39 per cent decline in annual profit to $91 million as the lower regulated price for its copper-based services generated weaker revenue. Weaker earnings are expected in the 2016 financial year.
Auckland International Airport declined 4.2 per cent to $4.99. The country's biggest gateway beat its own guidance with a 3.8 per cent gain in underlying annual earnings and said profit on that measure might rise as much as 8.3 per cent in 2016. Underlying profit, which excludes some revaluations of property and derivatives, rose to $176.4 million in the 12 months ended June 30, from $169.9 million a year earlier, while sales rose 6.9 per cent to $508.5 million.
On the New Zealand Alternative Index, GeoOp rose 4.7 per cent to 45c after it said it would raise $2.4 million in a private placement to foreign investors, senior management and the board to help fund expansion in Australia.