When opening a trading account, there are many factors to consider, including the ease of transferring funds, fees, and customer service. Choose a broker who specializes in the area you need. Shop around for one who meets your needs. One aspect penny stock investors should pay particular attention to is the fee structure. A number of brokers charge a commission per share. For an initial number of shares, this structure is usually set at one rate, and for each additional share, it is set at another rate.