Anyone researching Kainos Group plc (LON:KNOS) might want to consider the historical volatility of the share price. 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 type is company specific volatility. Investors use diversification across uncorrelated stocks to reduce this kind of price volatility across the portfolio. The second sort is caused by the natural volatility of markets, overall. For example, certain macroeconomic events will impact (virtually) all stocks on the market.

Some stocks mimic the volatility of the market quite closely, while others demonstrate muted, exagerrated or uncorrelated price movements. Beta can be a useful tool to understand how much a stock is influenced by market risk (volatility). However, Warren Buffett said ‘volatility is far from synonymous with risk’ in his 2014 letter to investors. So, while useful, beta is not the only metric to consider. To use beta as an investor, you must first understand that the overall market has a beta of one. A stock with a beta greater than one is more sensitive to broader market movements than a stock with a beta of less than one.

View our latest analysis for Kainos Group

What KNOS’s beta value tells investors

Zooming in on Kainos Group, we see it has a five year beta of 0.83. This is below 1, so historically its share price has been rather independent from the market. This means that — if history is a guide — buying the stock would reduce the impact of overall market volatility in many portfolios (depending on the beta of the portfolio, of course). Beta is worth considering, but it’s also important to consider whether Kainos Group is growing earnings and revenue. You can take a look for yourself, below.

Could KNOS’s size cause it to be more volatile?

With a market capitalisation of UK£496m, Kainos Group is a small cap stock. However, it is big enough to catch the attention of professional investors. Small companies often have a high beta value, but they can be heavily influenced by company-specific events. This might explain why this stock has a low beta.

What this means for you:

The Kainos Group doesn’t usually show much sensitivity to the broader market. This could be for a variety of reasons. Typically, smaller companies have a low beta if their share price tends to move a lot due to company specific developments. Alternatively, an strong dividend payer might move less than the market because investors are valuing it for its income stream. In order to fully understand whether KNOS is a good investment for you, we also need to consider important company-specific fundamentals such as Kainos Group’s financial health and performance track record. I highly recommend you dive deeper by considering the following: