Mt. Gox

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Mt。 Gox
Founded2010年7月18日
ParentTibanne Ltd.
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「Mount Gox」または単に「Gox」と呼ばれるGoxは、2010年の開始直後から2013年後半にかけての破産まで、最も広く使われていたビットコイン[為替交換]市場でした。引用エラー: <ref> タグに対応する </ref> タグが不足しています[1][2][3][4][5][6] Accounts with the equivalent of more than $8,750,000 were affected.[3] In order to prove that Mt.Gox still had control of the coins, the move of 424,242 bitcoins from "cold storage" to a Mt.Gox address was announced beforehand and executed in Block 132749.[7] It was later revealed that the coins may have never been in cold storage, as the proof-of-solvency transaction was broadcast through a remote Linux desktop and a single hot wallet.[8]

In October 2011, about two dozen transactions appeared in the block chain (Block 150951)[9] that sent a total of 2,609 BTC to invalid scripts. As they were impossible to satisfy/redeem, these Bitcoins were effectively destroyed.

On 22 February 2013, following an introduction of new anti-money laundering requirements by Dwolla, some Dwolla accounts became temporarily restricted. As a result, transactions from Mt. Gox to those accounts were cancelled by Dwolla. The funds never made it back to Mt. Gox accounts. Mt. Gox help desk issued the following comment: "Please be advised that you are actually not allowed to cancel any withdrawals received from Mt. Gox as we have never had this case before and we are working with Dwolla to locate your returned funds." The funds were finally returned on May 3, more than 3 months later, with a note "Please be advised never to cancel any Dwolla withdrawals from us again".

In March 2013, the new 0.8.0 version of Bitcoin Core temporarily forked off the main blockchain using differing rules on how transactions could be accepted. The Mt. Gox bitcoin exchange briefly halted bitcoin deposits. Bitcoin prices briefly dipped by 23% to $37 as the event occurred[10][11] before recovering to their previous level in the following hours, a price of approximately $48.[12]

Suspension of trading 2013

Mt. Gox suspended trading on 11 April 2013 until 12 April 2013 2 am UTC for a "market cooldown".[13] The value of a single bitcoin fell to a low of $55.59 after the resumption of trading before stabilizing above $100. Around mid May 2013, Mt. Gox traded 150,000 bitcoins per day per Bitcoin Charts.[14]

Mt. Gox suspended withdrawals in US dollars on June 20, 2013.[15] The Mizuho Bank branch in Tokyo that handled Mt. Gox transactions pressured Mt. Gox from then on to close its account.[14] On July 4, 2013, Mt. Gox announced that it had "fully resumed" withdrawals, but as of September 5, 2013, few US dollar withdrawals had been successfully completed.[16][17][18]

On August 5, 2013, Mt. Gox announced that they incurred "significant losses" due to crediting deposits which had not fully cleared and that new deposits would no longer be credited until the funds transfer was fully completed.[19]

CoinLab lawsuit and Homeland Security seizure of US funds

On 2 May 2013 CoinLab filed a $75 million lawsuit against Mt. Gox alleging a breach of contract.[20] The companies had formed a partnership in February 2013 under which CoinLab handled all of Mt. Gox's North American services.[20] CoinLab's lawsuit contends that Mt. Gox failed to allow them to move existing U.S. and Canadian customers from Mt. Gox to CoinLab.[20]

On 15 May 2013 the US Department of Homeland Security (DHS) issued a warrant to seize money from Mt. Gox's US subsidiary's account with payment processor Dwolla.[21] The warrant suggests the US Immigration and Customs Enforcement, an investigative branch of the DHS, felt that the subsidiary, which was not licensed by the US Financial Crimes Enforcement Network (FinCEN), was operating as an unregistered money transmitter in the US.[21][22] Between May and July more than $5 million were seized. [14] On 29 June 2013, Mt. Gox received its money services business (MSB) license from FinCEN.[22]

Withdrawals delayed or refused

Wired Magazine reported in November 2013 that customers were experiencing delays of weeks to months in withdrawing funds from their accounts.[23] The article said that the company had “effectively been frozen out of the U.S. banking system because of its regulatory problems”. Customer complaints about long delays were mounting as of February 2014, with more than 3300 posts in a thread about the topic on the BitcoinTalk online forum.[24]

Bankruptcy and shutdown

Main article: Collapse of Mt. Gox

See Also

References

  1. ↑ Karpeles, Mark (2011年6月30日), "Clarification of Mt Gox Compromised Accounts and Major Bitcoin Sell-Off" (Lua エラー: 内部エラー: インタープリターは終了コード 127 で終了しました。), Tibanne Co. Ltd., archived from the original on 2014年9月19日, https://web.archive.org/web/20110919162635/https://mtgox.com/press_release_20110630.html
  2. ↑ Lua エラー: 内部エラー: インタープリターは終了コード 127 で終了しました。
  3. ↑ 3.0 3.1 Mick, Jason (19 June 2011). "Inside the Mega-Hack of Bitcoin: the Full Story". DailyTech. http://www.dailytech.com/Inside+the+MegaHack+of+Bitcoin+the+Full+Story/article21942.htm.
  4. ↑ Lee, Timothy B. (19 June 2011). "Bitcoin prices plummet on hacked exchange". Ars Technica (Condé Nast). http://arstechnica.com/tech-policy/news/2011/06/bitcoin-price-plummets-on-compromised-exchange.ars.
  5. ↑ Mark Karpeles, 20 June 2011, Huge Bitcoin sell off due to a compromised account – rollback, Mt. Gox Support
  6. ↑ Chirgwin, Richard (19 June 2011). "Bitcoin collapses on malicious trade – Mt Gox scrambling to raise the Titanic". The Register. http://www.theregister.co.uk/2011/06/19/bitcoin_values_collapse_again/.
  7. ↑ Block 132749. Main chain. 2011-06-23. Hash 00000000000004bea72d0f390194b08162665a4fc99469c576338cd37164a15a. Block explorer
  8. ↑ /r/Bitcoin thread 3fe92x. I'm Ashley Barr, A.K.A "Adam Turner", the first Mt.Gox employee, and alleged DPR (:/). AMA 1 August 2015. This post
  9. ↑ http://blockexplorer.com/b/150951
  10. ↑ Lee, Timothy. "Major glitch in Bitcoin network sparks sell-off; price temporarily falls 23%". Ars Technica (Condé Nast). http://arstechnica.com/business/2013/03/major-glitch-in-bitcoin-network-sparks-sell-off-price-temporarily-falls-23/. Retrieved 12 March 2013.
  11. ↑ Blagdon, Jeff. "Technical problems cause Bitcoin to plummet from record high, Mt. Gox suspends deposits". The Verge. http://www.theverge.com/2013/3/12/4092898/technical-problems-cause-bitcoin-to-plummet-from-record-high. Retrieved 12 March 2013.
  12. ↑ "Bitcoin Charts". Bitcoin Charts. http://bitcoincharts.com/charts/mtgoxUSD#rg60zczsg2013-03-12zeg2013-03-15ztgSzm1g10zm2g25zv.
  13. ↑ "Twitter / MtGox: Trading is suspended until". Twitter.com. https://twitter.com/MtGox/status/322355614414147588. Retrieved 2014-02-17.[リンク切れ]
  14. ↑ 14.0 14.1 14.2 引用エラー: 無効な <ref> タグです。 「titan」という名前の引用句に対するテキストが指定されていません
  15. ↑ McMillan, Robert (20 June 2013). "Bitcoin’s Big Bank Problem: Why Did Mt. Gox Halt U.S. Payouts?". Wired (Condé Nast). http://www.wired.com/wiredenterprise/2013/06/mt-gox-stops/.
  16. ↑ Vigna, Paul (5 July 2013). "Bitcoin operator Mt. Gox resumes withdrawals". The Wall Street Journal. http://blogs.wsj.com/moneybeat/2013/07/05/bitcoin-operator-mt-gox-resumes-withdrawals/.
  17. ↑ Vigna, Paul (31 July 2013). "Bitcoin exchange Mt. Gox still grappling with slowdown". The Wall Street Journal. http://blogs.wsj.com/moneybeat/2013/07/30/bitcoin-exchange-mt-gox-still-grappling-with-slowdown/.
  18. ↑ Marron, Donald (3 September 2013). "How Bitcoin spreads violate a fundamental economic law". Forbes. http://www.forbes.com/sites/beltway/2013/09/03/how-bitcoin-spreads-violate-a-fundamental-economic-law/.
  19. ↑ "August 2013 Mt. Gox Status Update" (Lua エラー: 内部エラー: インタープリターは終了コード 127 で終了しました。), Mt. Gox Co. Ltd., 2013年8月5日, archived from the original on 2013年8月5日, https://web.archive.org/web/20130805084259/https://www.mtgox.com/press_release_20130805.html
  20. ↑ 20.0 20.1 20.2 Chen, Adrian (2 May 2013). "Massive Bitcoin Business Partnership Devolves Into $75 Million Lawsuit". Gawker Media. http://gawker.com/massive-bitcoin-business-partnership-devolves-into-75-487857656. Retrieved 8 June 2013.
  21. ↑ 21.0 21.1 Dillet, Romain (16 May 2013). "Feds Seize Assets From Mt. Gox’s Dwolla Account, Accuse It Of Violating Money Transfer Regulations". TechCrunch (AOL Inc.). http://techcrunch.com/2013/05/16/mt-gox-dwolla-account-money-seizure/. Retrieved 10 February 2014.
  22. ↑ 22.0 22.1 Buterin, Vitalik (29 June 2013). "MtGox Gets FinCEN MSB License". Bitcoin Magazine (Coin Publishing Ltd.). http://bitcoinmagazine.com/5560/mtgox-gets-fincen-msb-license/. Retrieved 10 February 2014.
  23. ↑ McMillan, Robert; Metz, Cade (6 November 2013). "The rise and fall of the world's largest Bitcoin exchange". Wired (Condé Nast). http://www.wired.com/wiredenterprise/2013/11/mtgox/. Retrieved 8 February 2014.
  24. ↑ Wong, Joon Ian (4 February 2014). "Poll: Are you having Mt. Gox withdrawal issues?". CoinDesk. http://www.coindesk.com/poll-mt-gox-withdrawal-issues/. Retrieved 9 February 2014.
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