Mercado Bitcoin says it will refund users after a $40M hack, with withdrawals frozen and no restart date.
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Binance reopened withdrawals after its record hack and saw $5.8B in net outflows, while THORChain's co-founder opposes a freeze demanded by the FBI.
CFTC now allows US exchanges to offer perpetual futures on individual stocks, a notable regulatory step.
Liquid's bitcoin peg is fully backed again after a $320M exploit, but the federation has not disclosed who paid to fill the gap.
A builder's post-mortem on a pricing engine for a 90-minute match-linked derivative: a unit test passed while the price was off by 26 points, and the fix exposed a free arbitrage.
Arbitrum's Security Council froze 8,426 ETH and 74.6M ARB in a Binance-linked wallet, and a walkthrough shows it moved funds without the holder's key.
ZachXBT published 11 addresses and a TRM Labs graph tracing $106M suspected stolen from an EU entity toward Monero and a Tron bridge.
Brazilian exchange Mercado Bitcoin halted withdrawals after a security incident; Hypernative attributes over $40M in outflows to it, while the exchange says no clients lost money.
BTCPay Server told operators to shut down with ./btcpay-down.sh after reports of hot-wallet sweeps. The alert names no affected versions and no patch yet.
Trail of Bits explains the cryptography behind e-voting and why paper ballots remain essential.
Chad Barraford explains why THORChain refused to block the $387M Bitget hacker's addresses, and the Tether freeze episode that followed.