Hong Kong’s competition watchdog is closely monitoring a potential megadeal between the city’s two largest supermarket chains amid a continued decline in grocery sales since 2020. The Competition Commission told the South China Morning Post on Friday that it was aware of media reports about the potential merger. “The commission is aware of the relevant media reports and is paying close attention to the matter and any future developments,” it said. Conglomerates Jardine Matheson and CK Hutchison,...