Traders at Swiss bank UBS made around 100 attempts to rig a key lending rate called Hibor, the region’s financial regulator has said.
The Hong Kong Monetary Authority (HKMA) found internal chat messages which contained “change requests” between 2006 and 2009.
The requests were made “with a view to rigging the Hibor fixing” HKMA said.
But the regulator said it found no evidence of collusion with other banks in the region to rig the rate.
Hibor stands for Hong Kong Interbank Offered Rate and is the rate at which banks lend to each other.
The regulator found “material weaknesses” in UBS’s internal controls and governance in managing the Hibor submission process and “in other areas”, it said in a statement.
HKMA said that it was “unacceptable” that UBS had failed to report the misconduct to authorities.
In a statement UBS said: “We are pleased that the investigation of the HKMA returned the same results as our own internal investigation – no collusion among banks and no noticeable impact on the fixing of Hibor from any conduct occurring during the period in question.
“We have not been part of the HIibor fixing panel since 2010 and have taken appropriate steps to incorporate the HKMA’s suggested improvements into our operations.”
However, the regulator said it was still considering whether further sanctions would be required.
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