Bernard Madoff pleaded guilty on Thursday to the largest financial services fraud in U.S. history, admitting to 11 criminal charges.

Prosecutors estimate Madoff’s fraud drew in as much as $65 billion since the late 1980s until he was arrested in December of last year.

The crimes carry maximum terms of up to 150 years imprisonment.

U.S. District Judge Denny Chin is expected to rule later today if Madoff will be immediately jailed until a future sentencing date.