Finding The Stock Market Industry Beta For Your Advantage
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Stock Market Industry Beta is the measure of how a stock's trading price moves compared to the market as a whole. Knowing this figure one can understand how volatile a stock is. When a stock has a beta of 1, it means that its price fluctuates exactly as much as the market. If a stock has a beta less than 1, then it is more predictable than the market, and if the beta is more than 1, then it's more volatile than the market.
Beta isn't just for stock; it can also be used for industries. Industry beta compares the volatility of the industry to the whole market. For instance, technology stocks would be more volatile than the industry, so the beta would be more than 1.
You need the historical data of the industry stock price and the historical price date of the entire market to be able to calculate the industry beta. For example, you want to find the beta for last year's technology stocks VS the S&P 500, then you should gather the needed historical data first. The next thing to do is to determine the movements of the two prices after every trading day. This will give a percentage change versus the previous day. Once you've got 365 values, get the average. The average industry movement is called Ri, and the average market movement is Rm. You then divide the technology industry's movement by the S&P's average movement, and you'll have an outcome of 1 (equally volatile), less than 1 (less volatile), or more than 1 (more volatile). If you write the function, it would look like:
Ri / Rm = Covariance (Ri, Rm) / Rm
Beta can be useful in stock research when judging how risky a stock is versus a stable investment with a guaranteed rate of return. Note that the longer the period of time the beta is acquired, the more accurate it will be. Beta is also valuable when used with stocks that have a long record of high volume trading. Smaller stocks that don't trade that much can fluctuate wildly on a busy day, and this throws the beta off.
Article Source: Articlelogy.com
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