Hong Kong stocks fell on Tuesday, tracking Wall Street’s losses, as renewed concerns about the artificial intelligence race weighed on sentiment, while mainland markets rallied on the first trading day in the Year of the Horse.The Hang Seng Index dropped 0.6 per cent to 26,913.68 at the open, paring some of the 2.5 per cent gain recorded on Monday. The Hang Seng Tech Index fell 1 per cent. On the mainland, the CSI 300 Index rose 1.4 per cent while the Shanghai Composite Index jumped 1.2 per...