U.S. regulators are scrutinizing one of the world’s largest cryptocurrency exchanges as questions mount over a digital token linked to its backers, Bloomberg reported on Tuesday. From the report: The U.S. Commodity Futures Trading Commission sent subpoenas last week to virtual-currency venue Bitfinex and Tether, a company that issues a widely traded coin and claims it’s pegged to the dollar, according to a person familiar with the matter. The firms share the same chief executive officer. Tether’s coins have become a popular substitute for dollars on cryptocurrency exchanges worldwide, with about $2.3 billion of the tokens outstanding as of Tuesday. While Tether has said all of its coins are backed by U.S. dollars held in reserve, the company has yet to provide conclusive evidence of its holdings to the public or have its accounts audited. Skeptics have questioned whether the money is really there.

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Source: Slashdot – US Regulators To Subpoena Crypto Exchange Bitfinex, Tether