Hong Kong stocks retreated on Thursday morning, surrendering recent gains as ongoing volatility across Asian markets and a brutal tech sell-off in neighbouring bourses weighed on local sentiment. At the lunchtime break, the benchmark Hang Seng Index was down 0.78 per cent to 24,011, erasing its initial upwards momentum. The Hang Seng Tech Index edged down 0.06 per cent, as the broader regional drag overshadowed optimism surrounding recent initial public offering lock-up expirations. Among...