Mt. Gox kept exchange open despite knowledge of large-scale theft
Exchange continued to operate and collect transaction fees despite its troubles, U.S. bankruptcy filing suggests
IDG News Service - Mt. Gox may have collected a large sum in trading fees in the weeks before its closure, even though it was already aware that a vast number of bitcoins had gone missing, its U.S. bankruptcy filing suggests.
A sworn declaration in the filing from Robert Marie Mark Karpeles, Mt. Gox 's CEO, reveals that the Bitcoin exchange knew in early February that its situation was far graver than it had disclosed at the time.
Mt. Gox halted bitcoin withdrawals from its exchange on Feb. 7. It told customers it was investigating possible fraud due to a security issue called transaction malleability, but did not specify at the time how many bitcoins were missing. Buying and selling on the exchange continued until Feb. 25, when its website went dark.
Mt. Gox's first disclosure of the scale of its problems came when it filed for bankruptcy protection in Tokyo District Court three days later, saying 750,000 of its customers' bitcoins were missing, along with 100,000 of its own.
It appears from the U.S. bankruptcy filing that Mt. Gox executives knew the gravity of the company's losses up to 19 days before its public disclosure, but gave traders no reason at the time to believe the exchange might not be solvent.
In the filing, Karpeles states that the withdrawals were halted Feb. 7 due to "the theft or disappearance of hundreds of thousands of bitcoins owned by Mt. Gox customers as well as Mt. Gox itself."
Why Mt. Gox continued to operate the exchange with that knowledge is unclear.
Karpeles did not respond to a request for comment for this article sent to his personal email address.
The impact of Mt. Gox allowing customers to buy and sell bitcoins it suspected it did not have may be revealed by class-action lawsuits, one of which was filed in Chicago on Feb. 27, and another of which is planned in the U.K.
"They took trading fees on assets which didn't exist and accepted deposits when they knew they were insolvent," Aaron G., a Bitcoin investor who did not want his last name used, said via email.A
"The origin of the losses may or may not be incompetence," added Aaron, who has filed a fraud complaint against Mt. Gox with Tokyo police. "But they knew for at least two weeks and kept operating as normal."
After Feb. 7, Mt. Gox was still processing thousands of trades a day, according to Bitcoincharts.com, which records trading volumes for many Bitcoin markets.
An average of 49,912 bitcoins were traded daily on Mt. Gox between Feb. 7 and Feb. 25, at an average weighted price of $380.54 per bitcoin.
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