34-year-old Goldman Sach high-yield trader, Tom Malafronte, managed to make $100mm ( while maintaining compliance with federal banking regulations).

As the Wall Street Journal points out, Malafronte was able to amass $100mm in profits for Goldman in a matter of just 6 months trading high-yield issuances ranging from mining companies to Avon.  Apparently Malafronte went on a buying spree in January when high-yield prices dipped with sources telling the WSJ that he accounted for more than one-third of the daily trading volume of many issuances during that period. 

www.zerohedge.com/news/2016-10-19/how-34-year-old-goldman-trader-made-100-million-few-months