$0.00 commission applies to online U.S. equity trades, exchange-traded funds (ETFs), and options (+ $0.65 per contract fee) in a Fidelity retail account only for Fidelity Brokerage Services LLC retail clients. Sell orders are subject to an activity assessment fee (from $0.01 to $0.03 per $1,000 of principal). Online Stock Trading, Investing, Online Broker | TD Ameritrade Explore TD Ameritrade, the best online broker for online stock trading, long-term investing, and retirement planning. Commission-free online trading *Offer valid for one new Individual, Joint, or IRA TD Ameritrade account opened by 04/30/2020 and funded within 60 calendar days of account opening. To receive $100 bonus, account must be