A priority to increase the profits of banks is investment operations in the stock market. Investment banking includes activities on raising capital using capital market instruments with the objective of capital appreciation. The article describes the investment objectives of the banks to improve their profitability, financial stability and enhance the effectiveness of the whole. The basic tools that enable banks to achieve the relevant objectives: profit, risk diversification, the maintenance of liquidity. For detail assessment of investment activities of banks analyzed the composition and structure of banks’ investments in debt and equity instruments of the stock market. Also presents a brief analysis of the investment preferences of commercial banks, in respect of those instruments, which are typical for the current economic situation in the country