Singapore Market You can place trading orders almost 24 hours a day (Except during the daily maintenance period, between 5.30pm to 7pm). Orders placed after market closure will be placed on queue on a first come first serve basis for next trading day. U.S. Market You may place orders with Citibank Brokerage 24 hours a day, except during the period between 5.15am - 5.45am. Orders placed after the U.S. markets close will be placed in a queue on a first come first serve basis for the next trading day. Hong Kong Market You may place orders with Brokerage Officers from 8.30am - 5.00am. Orders placed after the Hong Kong market close will be placed in a queue on a first come first serve basis for the next trading day.