Currently the unit is set by each company and can range from 100 shares per trade to thousands. Other markets, including in mainland China, typically trade with a standardized unit of 100 shares and in some cases as low as a single share.
Hong Kong’s stock exchange is discussing options to lower the threshold for investors to buy some of the city’s most expensive stocks to stoke trading, according to people familiar with the matter.
In background meetings between Hong Kong Exchanges & Clearing and the brokerage community in recent weeks, bourse officials raised the option of streamlining the minimum trading unit, or board lot, of each stock, the people said, asking not to be named because the matter is private.

