Best Brokers for US or Hong Kong Shares. We did an article last month that covers the best stock brokers for US and Hong Kong shares, so we won’t touch on it again. Check it out here if you’re keen. Best Stock Broker to buy China A-Shares? There aren’t that many Singapore Stock Brokers that allow access to China A-Shares (Shanghai and Cost is usually based on a per-transaction or per-share basis, allowing you to open an account with relatively little money. An account with an online broker allows you to buy and sell stocks/options instantly with just a few clicks. Since these types of brokers provide absolutely no investment advice, This method of buying partial shares of stock is known as fractional share investing. On major stock exchanges like the New York Stock Exchange, the exchange itself requires you buy at least one share at a time. For stocks like Alphabet ($1,200+ per share), Amazon ($1,700+ per share),