Mercado Bitcoin, Brazil’s largest cryptocurrency exchange, announced it will fully reimburse users for losses from a multi‑chain hack that stole roughly $40 million. The exchange confirmed that withdrawals remain frozen with no announced restart date.
What happened
On November 2, attackers breached Mercado Bitcoin’s systems and transferred between $46 million and $49 million in digital assets across ten blockchains. The breach prompted the exchange to freeze all deposits and withdrawals, a move reported earlier this week. According to CoinDesk, the platform has now pledged to cover every user loss, stating that customers will not bear any cost from the incident.
Investigators identified about $8 million in Ethereum that moved into new wallets after the attack, as reported by Bitcoinist. Partners including Tether, Circle and Chainalysis assisted in freezing approximately $11 million of the stolen funds, according to Coindesk. Despite these recovery efforts, the exchange has not set a date to resume withdrawals.
Why it matters for traders
The refund commitment may mitigate immediate panic among Brazilian retail traders, but the prolonged freeze could restrict liquidity for those holding BTC, ETH and other assets on the platform. A sudden influx of refunded tokens could create short‑term selling pressure on spot markets if users choose to liquidate once assets are returned. Additionally, the hack underscores operational risks for exchanges operating in emerging markets, potentially prompting traders to reassess exposure to regional platforms.
From a broader market perspective, the incident coincides with a modest rise in Bitcoin price (up 1.02% over 24 hours) and a 2.06% gain for Ethereum, suggesting that the hack has not yet triggered a systemic sell‑off. However, continued uncertainty around withdrawal availability may influence short‑term order flow on major exchanges.
What to watch next
- Announcement of a concrete timeline for resuming withdrawals on Mercado Bitcoin.
- Further asset recovery actions, especially the status of the $8 million ETH and the $11 million frozen by partners.
- Regulatory response from Brazil’s financial authorities, which may impose new security or capital‑reserve requirements.
- Potential legal actions by affected users or class‑action suits that could affect the exchange’s financial position.
- Market reaction to any large‑scale refund distribution, particularly on BTC/BRL and ETH/BRL trading pairs.
Sources
- Brazil's Biggest Bitcoin Exchange Says It Will Refund Users After a $40 Million Hack (decrypt.co)
- Mercado Bitcoin Hack: $8M in Ethereum Moved After Attack (bitcoinist.com)
- Mercado Bitcoin pledges to cover all user losses after near $40 million hack (coindesk.com)
- LIVE – Bitcoin Price Crashes as Iran Strike and Crypto Hack Spree Shake Markets (cryptonews.com)
This is a developing story and will be updated as new information is confirmed. For information only, not financial advice. How we report.
