The Hong Kong shares of dual-listed Chinese companies are trading at the smallest discount to their onshore peers in nearly five years, as a weaker US dollar spurs inflows and mainland investors snap up these stocks. The H shares of 160 firms, including Industrial and Commercial Bank of China and BYD, are trading 22 per cent below their mainland-listed A shares, according to a Hang Seng gauge tracking the disparity between the two markets. That marked the smallest gap since June 2020, as trading...