Hong Kong stocks rose on Tuesday, arresting a three-day decline, on optimism that the US will sweeten its tariff deals with key trading partners after the Trump administration postponed the effective date of new levies on 14 countries.The Hang Seng Index climbed 0.3 per cent to 23,960.03 as of 10.01am local time, while the Hang Seng Tech Index gained 0.5 per cent. On the mainland, the CSI 300 Index and the Shanghai Composite Index both added 0.2 per cent.Tech stocks led gains, with Baidu...