Jacqui Bradley has been found guilty of fleecing around $15 million from 28 investors.
The former financial advisor was found guilty and convicted of 75 Crimes Act charges this afternoon, including those for theft by a person in a special relationship and dishonestly using a document.
The jury's verdict was unanimous and it took around four hours to reach it.
Prosecutors said Bradley's company, B'On Financial Services, was a "money merry-go-round", and funds were not being invested legitimately like clients believed.
"It was all a lie," Crown lawyer Kristy McDonald QC told the jury in the Auckland District Court yesterday.
Investor money was also used to pay other clients back, in what is commonly known as a Ponzi-scheme, and was spent by the Bradleys for schools fees, the mortgage on their Remuera home, clothes shopping and payments on a BMW, the Crown said.
While Jacqui Bradley originally faced charges with her husband, Mike Bradley died last year aged 63.
Bradley was remanded in custody until Friday, October 19 for sentencing.By Hamish Fletcher @hamishfletcher Email Hamish