"The Tiwai prospect of leaving New Zealand is priced in, to a certain extent, to some of those gen-tailers now, and maybe Mercury had moved too far down the planning process to back out," he said.
Kathmandu Holdings led the market higher, up 3.1 per cent at $3.02 on a volume of 180,000, down on its 314,000 average.
Heartland Group rose 1.2 per cent to $1.67 after forecasting another increase in annual profit at today's annual meeting.
Vital Healthcare Property Trust increased 1.2 per cent to $2.61 after reporting a first-quarter loss of $1.4m, due primarily to unrealised losses on derivatives.
McIntyre said tomorrow's Reserve Bank policy review was hanging over the market, with investors tending to predict the committee will cut the official cash rate a quarter-point to 0.75 per cent. Property companies have been under pressure in recent weeks as global swap rates have increased, reducing the attraction of the dividend yield of the stocks.
Stride Property fell 1.8 per cent to $2.24 today, Investore Property was down 1.1 per cent at $1.87 and Precinct Properties New Zealand declined 0.6 per cent to $1.79 with 1.2 million shares traded.
Auckland International Airport fell 2.1 per cent to $9.10 on a volume of 1.2 million shares after government data showed short-term visitor arrivals entering New Zealand through the country's main gateway was flat, whereas other airports registered increases.
Air New Zealand decreased 0.5 per cent to $2.87 after it announced several hundred new regional routes to replace rival Jetstar's pared-back New Zealand operation.
Westpac Banking Corp posted the day's biggest decline, down 3.7 per cent, or $1.12, at $28.88. The dual-listed bank shed rights to an 80 Australian cent dividend today.
Fonterra Shareholders' Fund units declined 2.4 per cent to $4.05.
Spark New Zealand was the most traded stock on a volume of 2.9 million shares. It increased by 0.1 per cent to $4.44. Of other stocks trading on volumes of more than a million shares, Fletcher Building increased 0.2 per cent to $5.16, Oceania Healthcare gained 2.9 per cent to $1.07 and Fisher & Paykel Healthcare was up 0.2 per cent at $20.90.