New Zealand Refining fell 4.3 per cent to $2.22, Auckland International Airport was down 3.5 per cent to $7.355, and Ebos Group declined 2.7 per cent to $18.35.
Some of the moves are large, but need to be seen in the context of the gains seen so far this year, Williamson said. Despite today's selling, Trade Me is still up 34.5 per cent this year and Auckland International Airport has gained 32.5 per cent.
The best performer was Steel & Tube Holdings, up 1.3 per cent to $2.31. It has gained 4 per cent since Monday when it was announced it would drop out of the S&P/NZX50 benchmark index on September 16.
Fletcher Building gained 0.7 per cent to $11.10, and is up nearly 50 per cent this year. Strong construction demand has stoked interest in the building and construction company, which last month reported a 71 per cent gain in full-year profit to $462m and met its earnings guidance.
Trustpower rose 0.1 per cent to $7.95. The shareholders have overwhelmingly voted to carve out its windfarms and renewable development pipeline, splitting the company into two separate businesses that will be listed on the NZX and ASX.
Outside the main index, Veritas dropped 6.9 per cent to 27c. The listed hospitality company, which owns the Mad Butcher franchise and Nosh Food Markets, has agreed a deal with its bank to reduce debt repayments and reschedule its debt.
Wellington Merchants, formerly known as Kirkcaldie & Stains, was unchanged at $3.44. The directors have recommended its shareholders accept Sir Ron Brierley's latest takeover offer, with the two largest shareholders indicating they will do so. Brierley's Mercantile NZ has offered $3.45 per share, an uplift from his previous offers of $2.75 and $3 made in March and June, respectively.