A new proposal to change the stock exchange's trading hours has been put forward by the Hong Kong Securities and Futures Industry Staff Union. Ricky Tam Siu-hing, the union's adviser, said although the union did not oppose extending trading as suggested by Hong Kong Exchanges and Clearing (HKEx), it had a different idea on the arrangement of the hours. Exchange sources said that under HKEx's latest proposal, the trading hours would be from 10am to 1.30pm, and 2.30pm to 5pm, compared with the existing hours of 10am to 12.30pm and 2.30pm to 4pm. However, Mr Tam said the union, which claims to represent hundreds of staff in the broking industry, suggested the existing two-hour lunch break should be cut by only half an hour, making it 1pm to 2.30pm. The union also proposes that the closing time should not be later than 4.30pm, so brokerage staff could have time to process trade settlements. Mr Tam said the union planned to conduct a survey among its members now that the Easter holidays are finished, seeking more comments on the issue.