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GMO Million-Dollar Hacker Bounty and Data Leak Controversy

2 reports1 sourcesupdated 1 hour ago

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AI digest

AI-assisted source synthesis · not an independent investigation.

At 17:11 on October 28, 2026, Finance Magnates reported that Japanese broker GMO had launched a $1 million hacker bounty in response to what hackers claimed was GMO customer data; the report also said that Japanese FX brokers had tightened login measures after a cybersecurity incident, but did not specify whether all of these measures were implemented by GMO. The report did not disclose when the incident occurred, the number of affected customers, the authenticity of the data, or the specific rules of the bounty, nor did it provide any investigation findings, follow-up actions, or information on customer compensation. At 17:48, the media outlet mentioned again in another financial news roundup that GMO customer data had allegedly been made public, without providing any new facts or developments.

AI-written from reports · updated 50 minutes ago

LatestOct 28 17:48
As of 17:48 on October 28, follow-up reports had only repeated that the data was allegedly made public, without disclosing any investigation or response developments.

Developments

2 developments
  1. Oct 28 17:48 · 1 reports
    ThinkMarkets and Pepperstone bet on Anthropic
    Finance Magnates：ThinkMarkets and Pepperstone place bets on Anthropic’s debut using two different pricing methods
  2. Oct 28 17:11 · 1 reports
    GMO offers hackers a $1 million bounty
    Finance Magnates：GMO launches a $1 million hacker bounty, Japanese broker tightens login measures

Timeline

Follow the reporting to see the different sides of the story.

Oct 28
  1. Finance Magnates
    ThinkMarkets and Pepperstone place bets on Anthropic’s debut using two different pricing methods

    ThinkMarkets and Pepperstone have opened bets on Anthropic’s debut, using two different pricing methods. The roundup also covers financial news including GMO customer data allegedly being exposed by hackers, falling profits at Eightcap’s UK business, Germany’s BaFin removing a capital surcharge, and increased refunds to UAE investors.

  2. Finance Magnates
    GMO launches a $1 million hacker bounty, Japanese broker tightens login measures

    GMO launches a $1 million hacker bounty, while Japanese FX brokerages tighten login measures following a cybersecurity incident. Hackers publish purported GMO customer data; Eightcap’s UK business profits decline, BaFin lifts its capital surcharge, and refunds to UAE investors increase.

Heat over time

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