[HK stocks rally as buyers pile into Alibaba, JD.com after $97 billion tech rout while China pledges to temper wild swings] Hong Kong stocks rallied for a second day, trimming losses in the week, as traders continued to load up Chinese tech companies on valuation appeal. Chinese market regulator also pledged to prevent wild swings in prices. The Hang Seng Index added 1.6 per cent to 23,432.65 as of 3.20pm local time, narrowing the decline this week to less than 0.3 per cent. A late surge on Thursday lifted the market from near a 21-month low. The Hang Seng Tech...