Shares in a full house of Macau casinos have fallen following a report China's dominant bank card provider was implementing new risk prevention measures, in an effort to stop mainland Chinese citizens from illicitly swapping renminbi for foreign currency.
Hong Kong's South China Morning Post reported China UnionPay was setting up mechanisms to share intelligence with law enforcement agencies and regulators about some transactions.
Shares in Sands China, the Macau unit of US gaming mogul Sheldon Adelson's Las Vegas Sands, which operates casinos and malls in Macau, have fallen 5.6 per cent. Wynn Macau, the local division of Adelson rival Steve Wynn's Wynn Resorts, is down almost 8 per cent. Galaxy Entertainment, the casino group run by Asia's second richest person Lui Che-woo, is down 8.4 per cent.