South Korea's antitrust regulator fined 15 banks and brokerages a record 1.63 trillion won ($1.22 billion) combined for colluding in government bond auctions, saying they drove up the government's borrowing costs. The Fair Trade Commission said Wednesday that 10 securities firms and five banks shared bidding information or agreed on bid yields and volumes from January 2020 to June 2023. The penalties are the largest the commission has imposed in a single case, surpassing its 1.03 trillion won fi