The first thing you need to decide is what you want the money to do for you. Money saved for a down payment on a house gets treated different than money saved for the kid’s college, different than your retirement money, different than money for a fun vacation next year.
Here are some factors to consider:
Fees - investing often involves paying transaction fees, Schwab probably charges $10 or so to trade stock. That’s cheap, unless you’re only buying $100 worth, then you just lost 10% of your value in fees. You definitely want your fees to be as low as possible, you don’t get a damn thing for paying a fee. Mutual funds (structured collections of investments) have management fees as well, with actively managed funds being more expensive than “index” funds that merely match various market indexes.
Liquidity - How quickly can you turn your investment back into money? Money market funds are immediate, stocks generally take a day to a few days to transfer, CDs are locked in for the term, you can’t get your money out without paying a penalty. You get paid better for less liquidity, everything else being equal.
Diversification - A diverse portfolio of investments is important to maintain. If too much of your investment is in a single company’s stock, your fortunes ride entirely on that company’s performance. One bad fire, lawsuit or failed product introduction can tank your savings. Buying many stocks (through a mutual fund usually) insulates you from those dangers. When one stock takes a hit, it only represents a small percentage of your total investment. You also don’t get the huge highs of a great performing stock, but are you investing or gambling?
Risk - What are the risks of losing your principal? CDs, treasury bonds, and good corporate bonds are low risk. Fortune 500 stocks are more risky, penny stocks are more risky still. You get paid for taking on more “diversified” risk. Diversified risk is the amount of risk an investment represents, as part of diversified portfolio of investments. You do not get paid for “undiversified” risk, which is the risk you take on by putting all your eggs in one basket, that risk is entirely personal to you and your strategy, the market does not account for it at all.
I’m a big fan of mutual funds, especially index funds if you’re looking for the higher returns of the stock market. Mutual funds are automatic diversification with a small number of transactions and fees. That lets you get diverse with a smaller total investment. Index funds are low cost and you can review them by checking out the indexes in the newspaper. Actively managed mutual funds can also include bonds and a mix of stocks, bonds and other instruments, depending on the funds goals.
I am not a fan of buying individual stock, especially for the novice investor. Your expected returns are no better than the market as a whole, and you take on a heap of risk that you don’t get compensated for. I think people also expect to research the stock and pick up some kind of information that will indicate better than market performance. You won’t. There are hundreds of people researching that stock every single day, each of which knows more about how the market works than you, and by a wide margin. If anybody knows where that stock will go, it’s them, not you, and they’ve already made their trades.