When considering what you are going to invest in, it is important to weight the different kinds of risks involved, and figure out what your risk tolerance is.
Market risk is a measure of how much of a loss an investor is facing while trading. The market risk is usually measured using the beta of the stock that is being held in his/her portfolio.
Sometimes called “Systematic Risk,” it can happen for various reasons such as bad financial news or changes to the current rates. Because of the low-level of control investors have over this risk, portfolios generally can not be hedged against it.