Yellen says ransomware attack on China’s biggest bank minimally disrupted Treasury market trades

U.S. Treasury Secretary Janet Yellen is suggesting that a ransomware attack that forced China’s biggest bank to take some systems offline only minimally disrupted the U.S. Treasury market. She says U.S. and Chinese finance officials discussed the attack in San Francisco, where they met Friday ahead of a regional economic summit next week. The impacted Industrial and Commercial Bank of China Financial Services handles trades and other services for financial institutions. On its website, the bank said a ransomware attack forced it to disconnect and isolate affected systems.