Meritz Securities' home and mobile trading system (HTS/MTS) suffered a computer glitch on the 29th.
Meritz Securities said in a notice that "price processing for watchlist items is not running smoothly," adding, "We will take swift action to restore service quickly."
Meritz Securities had an app order error in April, and in May a system failure caused about an hour of disruption to U.S. stock trading.
Meritz Securities formed a task force (TF) to stabilize transactions and decided to invest a total of 20 billion won in information technology (IT) infrastructure by 2026.
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