UBS (UBSG.VX) said on Wednesday it has settled a probe by U.S. authorities over alleged rigging of currency markets by agreeing to pay $545 million in combined fines and pleading guilty to one count of wire fraud in a separate matter. The Swiss bank’s disclosure comes as part of what is expected to be a combined bill of more than $5 billion and criminal charges for five of the world’s biggest banks in a settlement with U.S. and British authorities over the foreign exchange probe.