So far it has invested $117 million in 126 companies which have gone on to raise total investment capital of $700 million, generated revenue of $1.25 billion and export earnings of $945 million. Notables include Orion Health, SLI Systems, PowerbyProxi, Booktrack, BioVittoria and Zephyr Technology.
"Capital markets are the growth engine for the economy but some parts can be strengthened," Joyce said.
NZVIF chief executive Franceska Banga said the new underwrite facility was unlikely to be called upon, but it was timely and welcome.
"It enables us to progress with new investment partnerships, like the recently announced co-fund partnership with Taiwan's National Development Fund," Banga said.
"We expect to see two to three new funds beginning the capital-raising process over the next three or four years which, if established, will help the flow of growth capital for start-up companies."
NZVIF now had the capacity to make investment commitments up to $300 million.