If you place a trade in dollars, SoFi converts that into a fraction of a share. A fractional share (Stock Bit), is a piece of a single share of stock you receive when you specify a dollar amount rather than a number of shares. If you placed an order for $500, for example, and you got $499.99 or 500.01 instead, it’s because we only divide shares up to 5 decimal places. Consequently, your order might execute for a penny more or less than what you entered.