If you own shares in Maharashtra Seamless Limited (NSE:MAHSEAMLES) then it's worth thinking about how it contributes to the volatility of your portfolio, overall. In finance, Beta is a measure of volatility. Volatility is considered to be a measure of risk in modern finance theory. Investors may think of volatility as falling into two main categories. The first category is company specific volatility. This can be dealt with by limiting your exposure to any particular stock. The second type is the broader market volatility, which you cannot diversify away, since it arises from macroeconomic factors which directly affects all the stocks on the market.

Some stocks see their prices move in concert with the market. Others tend towards stronger, gentler or unrelated price movements. Beta is a widely used metric to measure a stock's exposure to market risk (volatility). Before we go on, it's worth noting that Warren Buffett pointed out in his 2014 letter to shareholders that 'volatility is far from synonymous with risk.' Having said that, beta can still be rather useful. The first thing to understand about beta is that the beta of the overall market is one. A stock with a beta below one is either less volatile than the market, or more volatile but not corellated with the overall market. In comparison a stock with a beta of over one tends to be move in a similar direction to the market in the long term, but with greater changes in price.

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See our latest analysis for Maharashtra Seamless

What MAHSEAMLES's beta value tells investors

Zooming in on Maharashtra Seamless, we see it has a five year beta of 0.89. This is below 1, so historically its share price has been rather independent from the market. If history is a good guide, owning the stock should help ensure that your portfolio is not overly sensitive to market volatility. Share price volatility is well worth considering, but most long term investors consider the history of revenue and earnings growth to be more important. Take a look at how Maharashtra Seamless fares in that regard, below.

How does MAHSEAMLES's size impact its beta?

Maharashtra Seamless is a rather small company. It has a market capitalisation of ₹31b, which means it is probably under the radar of most investors. Companies with market capitalisations around this size often show poor correlation with the broader market because market volatility is overshadowed by company specific events, or other factors. It's worth checking to see how often shares are traded, because very small companies with very low beta values are often only thinly traded.