A market index tracks the performance of a group of stocks, which either represents the market as a whole or a specific sector of the market, like technology or retail companies. You’re likely to hear most about the S&P 500, the Nasdaq composite and the Dow Jones Industrial Average; they are often used as proxies for the performance of the overall market.

To make comparisons between companies, sectors and markets a little easier, there are a number of mathematical models used. The most common and often the most helpful is the P/E ratio. The Price to Earnings ratio takes the share price and is divided by the earnings per share. It is possible to calculate this using past earnings, projected future earnings and with all sorts of moving averages ;-) Therefore, this is one number that it is vital for any investor to know and understand.

ECN/Level 2 quotes: ECNs, or electronic communication networks, are computer-based systems that display the best available bid and ask quotes from multiple market participants and then automatically match and execute orders. Level 2 is a subscription-based service that provides real-time access to the Nasdaq order book composed of price quotes from market makers registering every Nasdaq-listed and OTC Bulletin Board security. Together, they can give you a sense of orders being executed in real time.
There are two types of stock research: fundamental and technical. Fundamental research explores company metrics such as earnings growth, earnings per share (EPS), debt, sales growth, and market capitalization. Meanwhile, technical analysis is all about learning how to read a stock chart and use historical price performance to help you predict future price direction. The best online brokerages offer tools to cover both types thoroughly, and we checked for 54 individual features during our 2020 Review. To compare research features, use the online brokerage comparison tool.
Before investing consider carefully the investment objectives, risks, and charges and expenses of the fund, including management fees, other expenses and special risks. This and other information may be found in each fund's prospectus or summary prospectus, if available. Always read the prospectus or summary prospectus carefully before you invest or send money. Prospectuses can be obtained by contacting us.
There are two types of brokers: full-service and discount. Full-service brokers tailor recommendations and charge higher fees, service charges, and commissions. Most investors are willing to pay these higher fees because of the research and resources these companies provide. With a discount broker, the majority of research falls on the investor; they just provide a platform to perform trades and customer support when needed. Newer investors can benefit from the resources provided by full-service brokers, while frequent traders and experienced investors who perform their own research may lean towards platforms with no commission fee.
Buy “the basket”: Can’t decide which of the companies in a particular industry will be the long-term winner? Buy ’em all! Buying a basket of stocks takes the pressure off picking “the one.” Having a stake in all the players that pass muster in your analysis means you won’t miss out if one takes off, and you can use gains from that winner to offset any losses. This strategy will also help you identify which company is “the one” so you can double down on your position if desired.