BOK crypto survey asks 31 banks and brokers to war-game an exchange hack
South Korea's central bank has quietly sent its first crypto-risk questionnaire to 18 banks and 13 securities firms, asking how they would cope if the country's biggest exchange went down after a hack.
Seoul's central bank wants to know what happens to traditional finance if crypto has a very bad week. The BOK crypto survey, reported on Monday, asks 31 financial institutions to describe their exposure to digital assets and how they would hold up under three stress scenarios.
What happened
The Bank of Korea sent the questionnaire on October 23 to 18 banks and 13 securities firms, according to The Herald Business and Yonhap as cited by Cointelegraph and Crypto Briefing. The list includes the five largest lenders, KB Kookmin, Shinhan, Hana, Woori and NH NongHyup. It is described as the bank's first systematic review of how regulated firms take part in the virtual asset market.
TokenPost said the form asks each institution to set out the organisation and budget behind its crypto work, its market-entry status, its risk assessments and its controls. Firms must also report amounts invested in domestic and overseas crypto companies, Cointelegraph added.
The scenarios are specific. One asks what happens if South Korea's largest exchange by market share temporarily stops operating after a major hack. Another covers a steep fall in prices, including bitcoin, followed by a prolonged slump in trading. A third asks about heavy losses at another financial institution tied to a crypto incident. Responses are due on November 4, Crypto Briefing reported.
Why it matters
The timing is coincidental but pointed. The survey went out before last week's $6.3 billion Binance theft, yet that event is exactly the kind of shock it models; our story on the Binance security incident showed how quickly a single compromised laptop can freeze an entire exchange.
The third scenario is the most telling. Asking about losses at a peer points straight at contagion, the risk that one firm's crypto problem spreads through funding markets. Crypto Briefing noted that the central bank's June 2026 Financial Stability Report had already flagged growing links between digital assets and traditional markets.
Korean lenders are moving deeper into the sector. Cointelegraph listed KB Financial's won stablecoin pilot in May and the Kakao Pay and KakaoBank work with Fireblocks in September, while legislation has lagged. Our report on the Korea crypto tax delay described a similar pattern of policy trailing the market.
A Bank of Korea official told The Korea Herald that institutions are preparing on their own even as virtual asset laws move more slowly than the market expected, Cointelegraph reported.
Responses to the BOK crypto survey are due on November 4, giving the 31 firms less than two weeks from the October 23 send-out to map their exposure.
What's next
A survey is not a rulebook, and nothing reported so far sets new requirements. Cointelegraph's summary of the questionnaire lists the scenarios in full.
The key question after November 4 is whether the central bank publishes findings, and whether the BOK crypto survey shapes its next financial stability report or the stalled Digital Asset Basic Act.
Regulators are also tightening cyber rules: the Financial Services Commission in October floated stricter security rules after its review found problems at 130 of the 555 financial companies it checked.
This article is for information only and is not investment advice.