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.

Network effects -- In simple terms, a network effect occurs as more people use a service or product, and the product or service itself becomes more valuable and desirable as a result. Think of companies like Facebook (NASDAQ:FB). As more and more people join Facebook, it becomes more difficult for people not to use the platform in their daily lives.

When thinking about a stock exchange it is worth remembering that it is a capital market. The primary purpose of a capital market is to enable businesses to raise money to provide working capital to fund expansion and growth. In exchange for this money, the companies issue equity in the form of stock, creating stockholders. Each stockholder ownes a piece of the active business relative to the amount of money they invested.

The last thing we need to cover before we get into some examples of great beginner stocks is what you should avoid as a beginning investor (and, in some cases, even when you become an experienced investor). Investing in the wrong type of stock can make your portfolio's value look like a roller coaster ride and can even cause you to lose your entire investment.
Pro tip: Another way to make sure your portfolio is diversified is to invest if different types of investments. Some people like to mix things up by investing in fine art through Masterworks. Fun fact – blue chip art returned 10.6% in 2018 compared to a 5.1% loss for the S&P 500. Others choose to invest in real estate through a company like DiversyFund.
In contrast, professional fund managers (information here) do not want tips. They have dozens of good ideas of their own. They won't be sharing those ideas with you and they will not be expecting you to share yours. Instead, they ask about how you allocate money. "Which sectors and markets do you like and why?" The difference between these approaches is like night and day.
Investing in stocks can be done in many ways. If you would like to form a strategy and manage your own investments, you can open a brokerage account. If you're unsure about where to start, consider opening an account with a robo advisor who will do the work at a lower cost. For those who want more guidance about their retirement plans, turning to financial advisors might be a good solution.
By knowing how much capital you will need and the future point in time when you will need it, you can calculate how much you should invest and what kind of return on your investment will be needed to produce the desired result. To estimate how much capital you are likely to need for retirement or future college expenses, use one of the free financial calculators available over the Internet.
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