Stocks and bonds, due to their high value, may in the foreseeable the future will bring less income than expected - the latter may be below average. Bank specialists warn about this Goldman Sachs. The stock market rebounded after a crash in the first half of the year amid pandemics, bonds fell slightly in value. Now both types of papers look quite expensive, the bank notes. Consequently, their profitability may be below average and, moreover, the risks for the successful diversification of investment portfolio. The latter is due to the fact that due to the high value of shares and bonds, it becomes more difficult to balance the portfolio, including in it has different asset classes. Despite this, the bank expects to improve situations in the future. Now he recommends buying bonds of developing countries, issued in local currency, as well as diversify the portfolio by including shares of various regions outside U.S.A. However, at the same time, Goldman calls for caution due to the high level of volatility present now.