Korea fines bond dealers record 1.63 trillion won

South Korea's antitrust regulator has fined more than a dozen banks and brokerages a record 1.63 trillion won ($1.2 billion) for colluding in government bond auctions over three and a half years.

Why it matters: The decision closes the largest cartel case in the Korean Treasury bond market's history and lands far below the multi-trillion won exposure the dealers faced when the commission's staff calculated fines on the full value of the affected auctions.

Data as of Bloomberg report of the Korea Fair Trade Commission statement issued Wednesday, November 11, 2026 (Korea time), read via the estate browser route; the article is paywalled beyond its opening paragraphs and the commission's own release has not yet been read directly, so per-firm amounts and any corrective orders are not yet reported here. The commission is already logged in SOURCES-TO-IMPLEMENT.md. Developing item.

South Korea’s Fair Trade Commission has imposed a record fine of 1.63 trillion won ($1.2 billion) on more than a dozen domestic banks and brokerages for colluding in government bond auctions, Bloomberg reported, citing the commission’s statement on Wednesday. The primary dealers exchanged bid yield information or agreed on yields and volumes in 150 Korean Treasury Bond auctions from January 2020 through June 2023, and the commission found agreements on specific bid yields or volumes in 145 of them, in a market of roughly 1,261 trillion won ($942 billion).

The decision ends a case the dealers had contested since the commission’s staff sent them its examination report. Staff had treated 76.2 trillion won of winning bids as the sales base for the fine, a method that pointed to theoretical penalties of up to 15 trillion won; the 1.63 trillion won imposed is a record for the commission but a fraction of that exposure.

Korea fines bond dealers record 1.63 trillion won

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