Businesses you don't understand -- Here's a great rule of thumb that works for beginners and expert investors alike. If you can't clearly explain what a company does and how it makes money in a sentence or two, don't invest in it. There are literally thousands of publicly traded companies to choose from, and you should be able to find plenty of opportunities in easy-to-understand businesses.
An online brokerage account likely offers your quickest and least expensive path to buying stocks, funds and a variety of other investments. With a broker, you can open an individual retirement account, also known as an IRA — here are our top picks for IRA accounts — or you can open a taxable brokerage account if you’re already saving adequately for retirement elsewhere.
Day trading is the act of buying and selling a financial instrument within the same day or even multiple times over the course of a day. Taking advantage of small price moves can be a lucrative game—if it is played correctly. But it can be a dangerous game for newbies or anyone who doesn't adhere to a well-thought-out strategy. What's more, not all brokers are suited for the high volume of trades made by day traders. Some brokers, however, are designed with the day trader in mind. You can check out our list of the best brokers for day trading to see which brokers best accommodate those who would like to day trade.
The Over-the-Counter Bulletin Board (OTCBB): This is owned by the NASDAQ, and as such has listing fees, standards, and reporting requirements. The companies trading upon it have a responsibility to provide the shareholders (you) with timely financial documentation. Higher-quality penny stocks list here when they are just shy of attaining the status that comes with the NASDAQ or NYSE.

There are plenty of interesting and simple online tools which can be used to improve your trading results, such as the Relative Strength Index (RSI). This is just one example from among dozens of possible technical analysis (TA) options, and you will need to discover and decide which ones work best for you. You may need to paper trade to figure out the best TA tools for you and your strategy. Besides these sorts of technical analysis indicators, there are a few "tried and true" rules:
What would make me sell: Sometimes there are good reasons to split up. For this part of your journal, compose an investing prenup that spells out what would drive you to sell the stock. We’re not talking about stock price movement, especially not short term, but fundamental changes to the business that affect its ability to grow over the long term. Some examples: The company loses a major customer, the CEO’s successor starts taking the business in a different direction, a major viable competitor emerges, or your investing thesis doesn’t pan out after a reasonable period of time.
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