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If you’re interested in Aareal Bank AG (ETR:ARL), then you might want to consider its beta (a measure of share price volatility) in order to understand how the stock could impact your portfolio. Modern finance theory considers volatility to be a measure of risk, and there are two main types of price volatility. The first category is company specific volatility. This can be dealt with by limiting your exposure to any particular stock. 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 are more sensitive to general market forces than others. 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.
See our latest analysis for Aareal Bank
What we can learn from ARL’s beta value
Zooming in on Aareal Bank, we see it has a five year beta of 1.33. This is above 1, so historically its share price has been influenced by the broader volatility of the stock market the market. If this beta value holds true in the future, Aareal Bank shares are likely to rise more than the market when the market is going up, but fall faster when the market is going down. 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 Aareal Bank fares in that regard, below.
Could ARL’s size cause it to be more volatile?
Aareal Bank is a small cap stock with a market capitalisation of €1.7b. Most companies this size are actively traded. It is quite common to see a small-cap stock with a beta greater than one. In part, that’s because relatively few investors can influence the price of a smaller company, compared to a large company.