Beta-factor - an indicator that measures the risk in the stock market
The modern economic system thatthe conditions of existence for large corporations, enterprises and even state-owned companies through the creation of joint-stock companies have already become customary for any person. Of course, in our country investing in securities does not have such a level of popularity among the population, as in the rest of the civilized world with a developed market system of economic relations. However, recent trends indicate an increasing reorientation of ordinary depositors of bank deposits to more complex investment systems. This, in turn, is a good signal for Russian society, which indicates the gradual approach of our homeland to the western standard of living and the priority of values. Of course, God forbid to do without the economic side of the modern civilized world, without its absurd sides.
How to calculate the beta coefficient?
To determine this indicator, usemethods of mathematical covariance, that is, methods for calculating quantities that reflect the dependence of two random values. Thus, the beta coefficient of the market portfolio is dependence, expressed in numerical form, fromthe current indicator of market fluctuations for a certain time ahead. That is, with a general market growth of 10% and a beta coefficient of 0.5 units, the value of the securities portfolio of the joint-stock company will grow by only 5%. To calculate this indicator, a covariance-dispersion formula is used, the beta coefficient according to which is determined as follows:
βa = Cov (ra, rp) / Var (rp), where:
- ra is the value that determines the given coefficient;
- rp - securities market;
- Cov - covariance of quantities;
- Var - the dispersion of the securities market. </ ul </ p>