"We are in positive territory and that is due to Fisher & Paykel Healthcare. It was up 39c at one stage which obviously was a great boost to the market as whole," said Bryon Burke, head of equities at Craigs Investment Partners.
The stock touched a high of $10.49, before paring gains, with the notice saying ResMed plans to replace the complaint with a new action and is still pursuing its patent dispute with the New Zealand maker of breathing masks in several other jurisdictions.
Heartland Bank shares rose 1.7 per cent to $1.77 after the New Zealand-owned lender said profit rose 13 per cent in the first nine months of its year on an expanding loan book and affirmed guidance for annual earnings growth.
Australia & New Zealand Banking Group fell 0.3 per cent to $31.51, while Westpac Banking Group declined 1.5 per cent to $34.80.
Burke said there were more losers than gainers today but volumes were light.
"The market is drifting to a large extent. It's very order-flow driven. The main stories today are Fisher & Paykel Healthcare and the Aussie banks."
Sky Network Television posted the biggest fall, down 3 per cent to $3.55. Burke said it reflected the quiet market as it didn't trade until the afternoon and overall there were only a handful of trades.
A2 Milk led the index higher, adding 2.3 per cent to $3.56 as bargain hunters moved in after some recent profit-taking. Units in Fonterra Shareholders' Fund ended flat at $6 after a better-than-expected overnight GlobalDairyTrade auction.
Kathmandu shed 1 per cent to $1.95, while Metlifecare fell 1.2 per cent to $5.68. Xero came in for profit-taking after a strong rise this week on expectations it will soon be in the black, shedding 0.8 per cent to $23.85.
Looking ahead, investors will be watching for earnings reports tomorrow from companies like Goodman Property Trust, which was trading up 0.4 per cent at $1.24 and Infratil, up 0.3 per cent at $2.99. Ryman Healthcare, up 0.8 per cent to $8.75, is due to report on Friday.