The article develops three indicators by which an investor trading on the Russian stock market can assess the level of such types of stock risks as liquidity risk, creditworthiness risk and the risk of force majeure. Based on the obtained indicators, a three-dimensional matrix of stock risks was constructed, with the help of which an investor who does not have high qualifications in finance can assess the degree of reliability of a particular security in order to make an informed decision on its inclusion in the investment portfolio.