![In total, UK and US authorities have imposed sanctions of more than six billion dollars in the Libor cases](https://assets.fnlondon.com/2016/05/IMG011214_full4x3.jpg)
In a setback for some of the world’s largest financial institutions, a US appeals court on May 23 reinstated the private antitrust lawsuits filed against 16 banks for allegedly rigging Libor interest rates.
The ruling from the New York's Court of Appeals for the Second Circuit reverses a lower court's decision from 2013, in which US District Judge Naomi Buchwald dismissed the claims because she said the banks' alleged conduct didn't violate federal antitrust laws.