According to an NZSF spokeswoman, this legal action has recently seen the British Court of Appeal agree with Nova Blanco that the challenge from investors should be heard in Portugal, not the United Kingdom.
That jurisdictional ruling was being challenged, the spokeswoman said, with the English Supreme Court granting leave to pursue the case, but a hearing was not likely until the middle of next year.
"We are also continuing to pursue our related legal actions in Portugal," the spokeswoman said.
While the NZSF expressed confidence when the case came to light, it wrote off the entirety of its investment in its 2015 accounts.
Despite this Portuguese misadventure, the NZSF -- with $34.2 billion under management -- has performed well against its peers and achieved average annual returns of 10.2 per cent since its inception in 2003.