Systematic risk is a risk associated with market returns. This risk is that it can be attributed to broad factors. it is a risk to your investment portfolio that cannot be attributed to the specific risk individual investments. Sources of systematic risk could be macroeconomic factors such as inflation, changes in interest rates, fluctuations in currencies, recessions, wars, etc. Marcro factors which influence the direction and volatility of the entire market would be systematic risk. An individual company cannot control systematic risk. Systematic risk can be partially mitigated by asset allocation. Owning different assets classes with low correlation can smooth portfolio volatility , because asset classes react differently to macroeconomic factors. When some asset categories (i.e. domestic equities, international stocks, bonds, cash, etc.) are increasing others may be falling and vice versa. To further reduce risk, asset allocation investment decisions should be based on valuation. I want to adjust my asset allocation target according to valuations. I want to overweight those asset classes that are bargains and own less or avoid investments which are overpriced. When mitigating systematic risk within a diversified portfolio, cash may be the most important and under appreciated assets category.