Shares in Cosco Shipping Energy Transportation (CSET) plunged in the first trading day since one of its major subsidiaries was put on Washington’s sanctions list.

On Monday, the shares closed down 21.1% at HKD 3.47 ($0.44) on the Hong Kong Stock Exchange, having collapsed by 23% during intra-day trading. CSET’s Shanghai-listed shares fell by the daily limit of 10% to CNY 6.72