Brent crude oil prices rose as much as 4 per cent before the Iranian statement.
Global logistics group Mainfreight fell 1.9 per cent to $42.55 and national carrier Air New Zealand declined 2 per cent at $2.90. New Zealand Oil & Gas increased 1.5 per cent to 67 cents.
Shane Solly, a portfolio manager at Harbour Asset Management, said investors had become more comfortable about the global economic outlook at the end of last year, and that the events in the Middle East over the past week had reignited some concerns.
Last year's best performers were among those leading the market lower, albeit on light volumes.
Among those, Summerset Group led the market lower, down 4.3 per cent at $8.50. Restaurant Brands New Zealand fell 2.7 per cent to $13.53 and Fisher & Paykel Healthcare declined 2.6 per cent to $21.90. NZX fell 2.2 per cent to $1.32.
Real estate data out yesterday showed a pick-up in demand in Auckland's property market. That would typically support the retirement village operators, with some investors linking them to residential property development. Most of those stocks had already enjoyed a strong December on news of a $1.5 billion takeover offer for Metlifecare.
Ryman Healthcare fell 0.7 per cent to $16.78 and Arvida Group decreased 0.5 per cent to $1.88. Metlifecare was the most traded stock on a volume of 1.6 million shares. It was unchanged at $6.86, still below the $7 takeover offer from Swedish buy-out firm EQT.
Fonterra Shareholders' Fund units rose 0.5 per cent to $4.05 after dairy prices were up at the first Global Dairy Trade auction of the year. Synlait Milk decreased 0.3 per cent to $9.05 and a2 Milk was down 0.5 per cent at $14.60.
Spark New Zealand rose 0.7 percent to $4.525 on a volume of 1.6 million shares. Sky Network Television was unchanged at 73 cents on a volume of 1.1 million shares, and Kiwi Property Group fell 1.6 per cent to $1.53 with 1.1 million shares changing hands.
Pushpay Holdings rose 1.7 percent to $4.16. It posted the day's biggest gain on the benchmark index. Auckland International Airport increased 1.4 per cent to $9.195 and Gentrack Group rose 1.3 per cent to $3.87.
BusinessDesk