Those few months still dominate his life.
Even now, Leeson pays most of his bills with money he makes on the after-dinner speaker circuit recalling the events of 1995.
His own appetite for risk, however, has not completely been scared out of him and he still invests, although now only with his own money.
He even offers tips on Twitter.
This time, he thinks there's a killing to be made in shorting gold and oil and isn't betting on the Nikkei rising in the wake of Japan's killer quake.
"Morally, I still think it's a difficult one to play," explained Leeson.