Sky Network Television fell 2.9 per cent to $2.37 and Trade Group declined 2.5 per cent to $4.33.
Kiwi Property Group fell 1.5 per cent to $1.33 after the real estate investor said it's sold its North City Shopping Centre in Porirua for $100m to a private investor.
Synlait Milk rose 2.3 per cent to $8.95, the biggest gain on the day after a Commerce Commission report questioned one of the components used to set Fonterra Cooperative Group's farmgate milk price, saying the level may be inflating what the larger milk processor pays its suppliers. Fonterra Shareholders' Fund units gained 0.4 per cent to $5.75.
Infratil gained 2.2 per cent to $3.19. The Wellington-based infrastructure investor said 2018 earnings were at the top end of guidance at today's investor day briefing, and that it's considering paying special dividends when it realises gains from its development investments to supplement ordinary returns. Infratil-controlled Trustpower rose 2.1 per cent to $5.74 and Tilt Renewables advanced 1.1 per cent to $1.89.
Williamson said Infratil's guidance was "pretty positive" and noted the prospect of special dividend payments.
Utility stocks largely weathered outages across the country's biggest city. Auckland International Airport rose 0.2 per cent to $6.415, lines company Vector increased 0.9 per cent to $3.25, while Chorus slipped 0.1 per cent to $4.035 and Spark New Zealand was unchanged at $3.385.
NZX increased 0.9 per cent to $1.09 after the stock market operator released its second consultation document on plans to simplify the listing rules. CDL Investments, a potential beneficiary if a lower free float is adopted, was unchanged at 94 cents while controlling shareholder Millennium & Copthorne Hotels NZ was also unchanged at $2.86.