Ever since the turn of the century, world stock markets have been very volatile. In other words there have been significant movements (up or down) in share prices. This phenomenon has been evidenced by the collapse in recent years of the share prices of the dot com companies (e.g. Yahoo, Amazon etc.) and the sharp falls in the share prices of telecommunication stocks (e.g. British Telecom, Marconi etc.). Yet despite these events there is very little emphasis placed on measuring the volatility of stocks.

The aim of this article is to explain one method of measuring the volatility namely beta factors and how investors can interpret this information. The article aims to state how investors can use beta factor analysis to their advantage when there are political uncertainties affecting markets. Though some stockbroker firms calculate the beta factors of certain stocks quoted in their respective stock exchanges, investors have little access to these figures. In more developed markets many stockbroker firms do have access to beta factors but it is only in recent years that investors have access to this information.

BETA FACTORS:

The beta of an investment is a relative measure of the systematic risk of an investment. In other words it measures the specific risk of the company's shares relative to the market as a whole. In general, the sign of the beta (+/-) indicates whether, on average, the investment's returns move with the market or in the opposite direction to the market. The scale or value of the beta indicates the relative volatility of the particular stock.

A beta of +0.25 for instance, would indicate that on average, the investment's returns move one quarter as much as the markets do in the same direction. If the market rose by 10%, the investment would be expected to rise by 2.5% but on the other hand if the market fell by 10% the investment would be expected to fall by only 2.5%. A beta of -0.1 would indicate that on average, the investment's returns move one tenth as much as the market's do, but in the opposite direction. If the market rose by 10%, the investment would be expected to fall by 1%. Hence we can summarise a number of situations:

If Beta > 1 this means that the investment's returns will move, on average, in the same direction as the market's returns, but to a greater extent.

If Beta = 1 this means that the investment's returns will move, on average, in the same direction as the market's returns, and to the same extent.

If 0 -1, to the same extent if Beta = -1, and to a greater extent if Beta < -1. In practice it is rare to find negative beta stocks since they go against the trend of the market. One possible sector that could consist of negative beta stocks is the gold industry that tends to go against the trend shown by equity markets.