Shares in Fisher and Paykel Healthcare rallied by 6.3 per cent on the back of news that it had agreed to agreed to bury the legal hatchet with its American arch-rival, ResMed, over patent issues.
After a few minutes of trade, the stock was up 84c at $14.22.
The company earlier announced its settlement of the global patent infringement litigation with ResMed would not have a material impact on its net profit after tax guidance for the financial year.
However, Mark Lister, head of private wealth research at Craigs Investment Partners, said analysts had factored in ongoing future legal costs into their valuations of the company.
"The litigation has by no means been a show stopper for them, but it has been a negative issue that's been hanging around for quite a while now," Lister said.