The Hang Seng Index opened 0.15% higher at 25,890.99 points on August 5, while the Hang Seng Tech Index rose 0.33% to 4,901.74 points. Pre-market turnover reached HKD 3.45 billion.

AI concept stocks strengthened, with Smart Whale (02513) climbing nearly 4%, MINIMAX-W (00100) advancing over 3%, Alibaba-W (09988) rising more than 2%, and Lenovo Group (00992) gaining over 3%.

The semiconductor sector was active, as ASMPT (00522) surged over 3%, Hua Hong Semiconductor (01347) added nearly 2%, and SMIC (00981) increased over 1%.

The optical communication sector opened sharply lower, with Zhongji Innolight (03308) dropping nearly 15% and Cambridge Technology (06166) falling over 11%. In the previous trading session, both Zhongji Innolight and Cambridge Technology had closed up 17% and nearly 20%, respectively.

Overnight, all three major US stock indices rose, with the Dow Jones up 1.71%, the S&P 500 up 1.79%, and the Nasdaq up 2.59%. Both the Dow and S&P hit new highs, while the Philadelphia Semiconductor Index jumped 6.55%.