Hong Kong stocks opened slightly lower Thursday morning as traders await a key speech by Federal Reserve boss Jerome Powell later in the day. The Hang Sang Index eased 0.09 percent, or 22.02 points, to 25,469.77. The benchmark Shanghai Composite Index added 0.11 percent, or 3.75 points, to 3,333.49, while the Shenzhen Composite Index on China's second exchange edged up 0.16 percent, or 3.64 points, to 2,241.53. dan/jah