Citi, UBS provide keys to interest rate-rigging probe: sources

(Reuters) – Citigroup Inc and UBS AG , in a series of disclosures to law-enforcement officials, have provided crucial information to investigators in multiple countries as part of inquiries into whether the world’s biggest banks manipulated a global benchmark interest rate, according to people familiar the situation. The two banks, linked by a trader who worked at both, have provided closely guarded details to U.S. …