[HK stocks sink by most in 14 months as tech sell-off deepens after China unleashes new measures against Tencent, private education firms] Hong Kong stocks sank by the most in 14 months as a sell-off in Chinese technology stocks persisted after China unleashed a round of regulatory tightening against private education companies. Tencent Holdings suffered the biggest sell-off in a decade after another punishment. The Hang Seng Index plunged 4.1 per cent to 26,192.32 at the close of Monday trading, the most since May 22 last year. The gauge declined 3.8 per cent so far this year. The benchmark fell...