We used a five-star-based rating system to rate companies in the discount stock brokers list above. The best brokerage firms would get the highest, five-star rating. In 2020 not a single firm got five stars, however six brokers were rated at four and half stars. Any brokerage house with two- or one-star rating should be avoided. Three-star rated firm is perfectly fine, but there are, probably, better options for investors to consider. All companies with three and half stars and higher are recommended for at least one category of investors.
Stock brokers are people or firms licensed to buy and sell stocks and other securities via the stock market exchanges. Back in the day, the only way for individuals to invest directly in stocks was to hire stock brokers to place trades on their behalf. But what was once a clunky, costly transaction conducted via landline telephones now takes place online in seconds, for a fraction of what full-service brokers used to charge for the service. Today, most investors place their trades through an online brokerage account. (A little lost? Check out our explainers on brokerage accounts and buying stocks.)
The use of borrowed money “levers” or exaggerates the result of price movement. Suppose the stock moves to $200 a share and you sell it. If you had used your own money exclusively, your return would be 100% on your investment [($20,000 -$10,000)/$10,000]. If you had borrowed $5,000 to buy the stock and sold at $200 per share, your return would be 300 % [(20,000-$5,000)/$5,000] after repaying the $5,000 loan and excluding the cost of interest paid to the broker.

Notice: Information contained herein is not and should not be construed as an offer, solicitation, or recommendation to buy or sell securities. The information has been obtained from sources we believe to be reliable; however no guarantee is made or implied with respect to its accuracy, timeliness, or completeness. Authors may own the stocks they discuss. The information and content are subject to change without notice.

In the professional world, one of the key concepts is diversification. Harry Markowitz is a Nobel prize winning economist and one of his major discoveries was that adding new asset classes can dramatically alter the overall risk profile of a portfolio. His finding was that a portfolio that contained very low risk assets would normally benefit from lower volatility and higher returns if a higher risk asset was added. This is due to the likely lack of correlation between high and low risk asset classes.
Participation is required to be included. Each broker completed an in-depth data profile and provided executive time (live in person or over the web) for an annual update meeting. Our rigorous data validation process yields an error rate of less than .001% each year, providing site visitors quality data they can trust. Learn more about how we test.

NerdWallet's ratings for brokers and robo-advisors are weighted averages of several categories, including investment selection, customer support, account fees, account minimum, trading costs and more. Our survey of brokers and robo-advisors includes the largest U.S. providers by assets under management, plus notable and/or emerging players in the industry. Factors we consider, depending on the category, include advisory fees, branch access, user-facing technology, customer service and mobile features. The stars represent ratings from poor (one star) to excellent (five stars). Ratings are rounded to the nearest half-star.
Below is the list of online brokers doing business in the United States. Their names are ordered alphabetically. The table contains brokerage name, firms' website links, commissions on stock and ETF trades, and minimum amounts required to open a new brokerage account. There you could also find the discount stock trading companies ratings as well as links to detailed account reviews.
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