A new study of Bernie Madoff’s Ponzi scheme concludes that JPMorgan Chase made over $900 million in pretax profits from the Madoff scam. The academic paper by Dr. Linus Wilson, a finance professor at University of Louisiana at Lafayette, makes use of newly released data and different methods of calculation than previous studies. Wilson’s paper looks at total Madoff-linked account balances at JPMorgan Chase from 1986 to 2008, a longer period than earlier studies, which may have underestimated JPMorgan’s profits.