![Jerome Kerviel](https://static-ssl.businessinsider.com/image/53299ad76bb3f7907ebe296a-661-495/jerome-kerviel.png)
Reuters/ Alessandro Bianchi
Kerviel, 37, is currently on a backpacking trek from Rome to Paris.
In 2008, it was revealed that Kerviel lost the French bank approximately 4.9 billion euros ($6.9 billion) through arbitrage of equity derivatives.
He was sentenced in October 2010 to $4, but had appealed for a new trial.
Today, the appeals court in Paris gave the final verdict. He now faces prison time and a massive fine.
![Kerviel](https://static-ssl.businessinsider.com/image/53299af0ecad041122df3c07-1190-892/kerviel-1.png)
AP Images