In September 2007, Currin was sentenced to nearly six years behind bars. He was convicted of lying to a grand jury, obstructing justice and cheating the IRS.
The charges stems from a scheme to manipulate companies' stock prices through spam e-mail.
Federal prosecutors recommended earlier this year that Currin's sentence be reduced after giving testimony against a co-conspirator.
It is not known when Currin will be released from jail.