1.Investments in foreign securities involve certain risks that differ from the risks of investing in domestic securities.
2.Adverse political, economic, social or other conditions in a foreign country may make the stocks of that country difficult or impossible to sell.
3.It is more difficult to obtain reliable information about some foreign securities.
4.The costs of investing in some foreign markets may be higher than investing in domestic markets.
5.Investments in foreign securities also are subject to currency fluctuations.
Securities on the Hong Kong Exchange are subject to a minimum 「board lot size」 (also known as a 「trading unit」) that is determined by the issuer. Securities of less than one trading unit—an 「odd lot」—may be manually matched for trading but the price may be worse than the price for a trading unit. You may check the boardlot size of a security here.