Yes, the Philippine Stock Exchange determines the minimum quantity of shares based on the price of the stock. The minimum size is called Board Lot. If the stock’s board lot is 1,000 then the quantity of shares you can purchase should be divisible by 1,000. Therefore, if you order 8,400 or 5,600 you will be rejected while 3,000, 7,000 or 15,000 will be accepted.

Board Lots and Price Fluctuations