The trend of zero dollar commission trading makes investing more accessible to more people, especially as account minimums disappear. It’s important to understand that when a broker offers zero dollar commission trading, it really just means their own fee for helping execute the trade. There might still be other fees involved. Remember, too, that exchange-traded funds come with expense ratios, and those fees are still charged, even if there isn’t a commission for buying or selling them. As with any investment, it’s important to understand what you’re getting into, understand the terms, and make sure you’re prepared for potential losses. If you’re looking for an online broker for your investment needs, here are seven that don’t charge trading fees.