Shares of Chinese toymaker Pop Mart rallied nearly 10 per cent on Tuesday morning before closing more than 9 per cent higher after the company announced its first share buy-back in nearly two years, following a decline from last year’s peak. Pop Mart’s Hong Kong-listed shares rose to HK$198.70 at the open as investors welcomed the move. Shares closed 9.1 per cent higher at HK$197.20. The stock remains below last year’s closing level of HK$200.20, and more than 40 per cent off its August peak,...