Bitcoin Crashes Again After China Move

Bitcoin tumbled on Friday, heading for its worst week since January 2015, after people familiar with the matter said China aims to stop exchange trading of crypto currencies by the end of September.

Regional Chinese regulators were notified of the timeline by a central bank-led group overseeing Internet finance risks, said the people, who asked not to be named because the information is private. Bitcoin dropped 9.3% to $3,077.55 in London, extending this week’s decline to 28%, Bloomberg reported.

The notice suggests Chinese policy makers will move quickly on a previously reported plan to end exchange trading, their most far-reaching measure to rein in the growth of crypto currencies. China’s crackdown, which includes a ban on initial coin offerings announced last week, has fueled an abrupt reversal in bitcoin after the digital currency soared more than 700% in the 12 months through August.

The digital currency tumbled on Thursday after BTC China, one of the country’s largest crypto currency venues, said it would stop handling trades by month-end. Rivals OKCoin and Huobi said they haven’t received any regulatory orders to halt. The People’s Bank of China didn’t immediately reply to a faxed request for comment.

The crypto currency ban will only apply to trading on exchanges, people familiar with the matter told Bloomberg on Monday. Authorities don’t have plans to stop over-the-counter transactions, the people said.

While Beijing’s motivation for the exchange ban is unclear, it comes amid a broad clampdown on financial risk in the run-up to a Communist Party leadership reshuffle next month. Bitcoin’s surge over the past few years has fueled concerns of a bubble and prompted warnings of a potential crash from skeptics including JPMorgan Chase & Co.’s Jamie Dimon and billionaire investor Howard Marks.

China accounts for about 23% of bitcoin trades and is also home to many of the world’s biggest bitcoin miners, who use vast amounts of computing power to confirm transactions in the digital currency.

Some market observers have speculated that Chinese regulators will allow crypto currency exchanges to reopen once the government has measures in place to provide greater oversight.

Matt Roszak, the chairman of Washington-based Chamber of Digital Commerce and an investor in BTC China, said he anticipates that the exchange will resume operations by year-end.