Securities, like any other asset or commodity traded on the market, can rise or fall in price, you can make sure of this by looking at the chevron stocks  quotes. In the long term, the shares of reliable companies tend to rise as the enterprise develops. For long-term deposits, it is advisable to choose stocks of well-known and serious companies that do not grow so quickly and do not bring very large profits (per year, for example), but the risks of losses are minimal.