[Alibaba, JD.com dent HK stock market as Shanghai lockdown, economic report heighten slowdown concerns] Hong Kong stocks fell by the most in a week after Shanghai reported a record number of Covid-19 cases amid an extended lockdown around the financial hub, while a private report indicated China’s economic activity cooled further last month. The Hang Seng Index tumbled 1.8 per cent to 22,080.52 at the close of Wednesday trading, ending a two-day advance. The Tech Index slipped 3.8 per cent while the CSI300 Index of onshore shares retreated 0.3 per cent following a two-day public holiday. JD.com slumped 4.8 per…