The Justice Department has opened a criminal probe into whether traders are manipulating the price of Bitcoin and other digital currencies, dramatically ratcheting up U.S. scrutiny of red-hot markets that critics say are rife with misconduct, according to four people familiar with the matter.
The investigation is focused on illegal practices that can influence prices -- such as spoofing, or flooding the market with fake orders to trick other traders into buying or selling, said the people, who asked not to be identified because the review is private. Federal prosecutors are working with the Commodity Futures Trading Commission, a financial regulator that oversees derivatives tied to Bitcoin, the people said.
Authorities worry that virtual currencies are susceptible to fraud for multiple reasons: skepticism that all exchanges are actively pursuing cheaters, wild price swings that could make it easy to push valuations around and a lack of regulations like the ones that govern stocks and other assets.