"On the first day of the eight week trial I said to Paul Davison, my QC: The best thing that could happen now would be for me to drop dead..." Sir Douglas told NBR.
According to the NBR's website, Graham wept "when describing the shame and embarrassment he [has] brought upon his family and friends."
"I'm finished... but it's been tough for them, especially my wife and children knowing that I have a criminal conviction. I've written to each of my children apologising for what's happened."
Graham told NBR he lost a $2 million shareholding in Lombard, and that his only form of income was a $26,000 parliamentary pension.
There was "next to no money in the kitty" to pay reparations to investors, he told NBR.
"I am not able to earn anything and any talk about reparations is a nonsense," he said.
Graham faces a maximum penalty of $300,000 in fines or five years' imprisonment.
Justice Robert Dobson indicated last month community sentence would be suitable, but did not rule out a jail term.