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If you own shares in Bluejay Mining plc (LON:JAY) then it’s worth thinking about how it contributes to the volatility of your portfolio, overall. In finance, Beta is a measure of volatility. Modern finance theory considers volatility to be a measure of risk, and there are two main types of price volatility. The first type is company specific volatility. Investors use diversification across uncorrelated stocks to reduce this kind of price volatility across the portfolio. The other type, which cannot be diversified away, is the volatility of the entire market. Every stock in the market is exposed to this volatility, which is linked to the fact that stocks prices are correlated in an efficient market.

Some stocks see their prices move in concert with the market. Others tend towards stronger, gentler or unrelated 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 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.

See our latest analysis for Bluejay Mining

What does JAY’s beta value mean to investors?

Bluejay Mining has a five-year beta of 1.05. This is reasonably close to the market beta of 1, so the stock has in the past displayed similar levels of volatility to the overall market. While history does not always repeat, this may indicate that the stock price will continue to be exposed to market risk, albeit not overly so. Many would argue that beta is useful in position sizing, but fundamental metrics such as revenue and earnings are more important overall. You can see Bluejay Mining’s revenue and earnings in the image below.

How does JAY’s size impact its beta?

Bluejay Mining is a noticeably small company, with a market capitalisation of UK£106m. Most companies this size are not always actively traded. It doesn’t take much money to really move the share price of a company as small as this one. That makes it somewhat unusual that it has a beta value so close to the overall market.