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Transactions from hacked brokerage accounts topped \u00a5300 billion in the first four months of 2025, data from the Financial Services Agency has shown, reflecting a sharp rise in cases in which hackers are believed to have been manipulating stock prices via those accounts.<\/p>\n\n\n\n
According to the data released May 8, the number of unauthorized access cases to the accounts of stock holders soared from just 65 in January to 4,852 in April. Fraudulent trades similarly jumped from 39 to 2,746 over the same period.<\/p>\n\n\n\n
In total, there were 6,380 cases of unauthorized access and 3,505 instances of fraudulent trades between January and April, the FSA figures showed. The transactions included about \u00a5161.2 billion in unauthorized selling and \u00a5143.7 billion in unauthorized purchases.<\/p>\n\n\n\n
The FSA warned these figures are provisional and likely the tip of the iceberg as more cases could have gone unreported.<\/p>\n\n\n\n
In many reported cases, hackers first purchase small-size stocks \u2014 or stocks with a relatively small market capitalization \u2014 for themselves.<\/p>\n\n\n\n
After they gain control of the accounts of independent investors through phishing, malware and other illicit measures, they sell whatever shares the account\u2019s owner held, then use those proceeds to purchase stocks they had previously bought for themselves to inflate the stocks\u2019 prices.<\/p>\n\n\n\n
Once the stocks\u2019 prices rise, the hackers sell their shares to make a profit. The mark of a hacked account is a portfolio comprising domestic or overseas stocks with which the account holder is unfamiliar.<\/p>\n\n\n\n
Such illicit trades have triggered a sweeping regulatory response and compensation pledges from the nation\u2019s largest securities firms.<\/p>\n\n\n\n
Ten major brokerages \u2014 including SBI Securities, Rakuten Securities and Nomura Securities \u2014 have agreed to compensate clients for losses tied to unauthorized trades conducted since January.<\/p>\n<\/div><\/div>\n\n\n\n
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