Have you ever asked yourself, "What is stock?" or wondered why shares of stock exist? This introduction to the world of investing in stocks will provide answers to those questions and show you just how simple Wall Street really is. It may turn out to be one of the most important articles you've ever read if you don't understand what stocks represent. Find out the answer to "What is Stock?" and how it comes to exist ...

We found Robinhood’s trading interface — both via its mobile app and its website — the most user-friendly of all candidates, making it a perfect option for the first-time trader. The design is minimalist, interactive, and easy to navigate. “Robinhood is a good fit for new investors because it offers a slick, modern app that allows you to trade efficiently,” says James Royal, a stock analyst and investing and wealth management reporter at Bankrate. “And of course, it's free, allowing you to invest money that would have otherwise gone into a broker's pocket.”
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A mentor could be a family member, a friend, a past or current professor, co-worker, or any individual that has a fundamental understanding of the stock market. A good mentor is willing to answer questions, provide help, recommend useful resources, and keep spirits up when the market gets tough. All successful investors of the past and present have had mentors during their early days.
Like Fidelity and Vanguard, Charles Schwab is one of the older brick-and-mortar investment brokers that successfully modernized its trading platform for the Internet Age. Of all our picks, Charles Schwab is the best option for advanced traders who want a full buffet of options (stocks, ETFs, options, bonds, mutual funds, futures) and an impressive suite of research tools. Best of all, even with all the perks Charles Schwab offers, it’s still one of the lowest-cost trading platforms, with cheaper fees than E*TRADE or TD Ameritrade on most trades.
Not everyone who buys and sells stocks is a stock trader, at least in the nuanced language of investing terms. Most investors fall into one of two camps. Depending on the frequency in which they transact and the strategy driving their actions, they’re either “traders” (think Gordon Gekko in the movie “Wall Street”) or “investors” (as in Warren Buffett).
TD Ameritrade offers two best-in-class platforms, designed for two different types of investors. Both platforms are free to use for any investor with a TD Ameritrade account. The web-based Trade Architect, though often in the shadow of thinkorswim, is streamlined and easy to use. It will appeal to beginning investors or anyone who prefers a simplified educational interface. Its tab-based navigation lets users flip between trading tools and account overview, plus charts, stock screeners, heat maps, and more.
In terms of volume, Interactive Brokers is technically the largest online stock trading platform in the U.S. It also advertises itself as the “lowest cost broker,” and for good reason: It only charges a startlingly low $0.005 per trade on stocks, ETFs, options, bonds, mutual funds, and futures (plus a 7 cent per contract fee for options). Technically, that’s still higher than Robinhood, but Robinhood only offers stocks, ETFs, and options (and as we noted above, Robinhood does skim some money off the top of trades via “payment for order flow”).

Choose your trading partner wisely. To trade stocks you need a broker, but don’t just fall for any broker. Pick one with the terms and tools that best align with your investing style and experience. A higher priority for active traders will be low commissions and fast order execution for time-sensitive trades (like our picks for best online platforms for active traders/day traders). Investors who are new to trading should look for a broker that can teach them the tools of the trade via educational articles, online tutorials and in-person seminars (see NerdWallet’s round-ups for the best brokers for beginners). Other features to consider are the quality and availability of screening and stock analysis tools, on-the-go alerts, easy order entry and customer service.
Robo-advisors like Wealthsimple, Wealthfront, and Betterment use algorithms to determine your investment strategy. You just plug in your time frame and risk tolerance and their computers do the rest. And because they’re targeted for a younger crowd, fees are rock bottom. Wealthsimple and Betterment both have no account minimum, while Wealthfront requires $500. Wealthsimple charges an annual 0.5% advising fee; Wealthfront and Betterment charge just 0.25%.
TD Ameritrade has been a powerful player in the online stock trading ecosystem for years. The flipside to such robust platforms? Cost. Even though TD Ameritrade lowered its fees in 2017 from $9.99 to $6.95, pretty much every other major discount broker slashed its prices, too. TD Ameritrade remains one of the more expensive options out there, even with more than 100 commission-free ETFs. Though its pricing structure is more expensive than those of some of the other discount brokers, there are many traders who think it's a best-in-class trading platform.
How much money do I need to start investing in stocks? The amount of money you need to buy an individual stock depends on how expensive the shares are. (Share prices can range from just a few dollars to a few thousand dollars.) If you want mutual funds and have a small budget, an exchange-traded fund (ETF) may be your best bet. Mutual funds often have minimums of $1,000 or more, but ETFs trade like a stock, which means you purchase them for a share price — in some cases, less than $100).