Etf must buy at least one standard lot, namely 100 copies. The trading rules of OTC funds, whether ETF, LOF or closed-end funds, are the same as those of stocks. The minimum subscription is 100 shares (corresponding to 100 shares), and the subscription for more than 100 shares must be 100 shares, 100 shares and 20 shares.

Considering the transaction cost, if the unit price of etf is too much and the subscription quantity is too small, the transaction cost will be high, and investors can decide according to the actual situation.