The Equity markets are falling and risk is more in that asset class and therefore you see a lot of negative rate of return. Successive decrease in interest rates have moved up the rate of return in debt segment.
Risks are inevitable in investments, when rates move up one is happy and when rates move down , feels unhappy. The truth lie between these two. One has to endure fluctuations over a fairly good period of time to real the benefit of investing. The graph , at this point just gives an idea of relative risk in the different shades of risk classes.
Let the market take its own time to come up organically as always. Investors get benefit by appropriately dealing with their investment. each investment needs to be viewed in its purpose and risk profile of the investor.