Pedestrians walk outside an E*Trade Financial office in New York.

Retail brokerage firm E-Trade announced Wednesday it will drop commission fees on online U.S. stock, ETF and options trades.

The move comes within a week of Interactive Brokers, Charles Schwab and TD Ameritrade all dropping their commission fees. Shares of all the brokerage firms have been getting hit this week on fears that a lack of commission revenue with hurt margins.

E-Trade's new fee structure will start on October 7. Options will still have a 65 cents charge per contract.