There are a couple reasons why anyone (not only beginners) can lose money in the stock market. Having no patience and trying to “get rich quick” off risky single stock trades can backfire big-time—just like spending your savings at a slot machine.
You can also lose your money if you get spooked by market volatility and bail on your long-term investments too soon. The economy always recovers, but pulling your money out of your investments basically locks in your losses before they have a chance to bounce back. Keep a long-term perspective. And when in doubt, give your investment pro a call to calm your nerves.