When you invest in shares, you put money into a company. If the company you have invested in performs worse than expected, the value of the company’s share falls. In other words, the share is worth less than when you bought it.
Whether companies are doing well or badly is extremely unpredictable, which is why money can be lost quickly. On the other hand, money can be earned quickly when things go well.
PensionDanmark always invests your savings in a mix of shares and bonds so that the risk of loss is not too great. This means you have a good chance of making a profit from shares and at the same time you are guaranteed a more stable return from bonds.