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 three years in prison and slapped with a fine of 4.9 billion euros, 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.
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