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How Does Grenke AG (ETR:GLJ) Affect Your Portfolio Volatility?

Anyone researching Grenke AG (ETR:GLJ) 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 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 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.

View our latest analysis for Grenke

What does GLJ's beta value mean to investors?

Given that it has a beta of 1.33, we can surmise that the Grenke share price has been fairly sensitive to market volatility (over the last 5 years). If this beta value holds true in the future, Grenke 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 Grenke fares in that regard, below.

XTRA:GLJ Income Statement, August 22nd 2019
XTRA:GLJ Income Statement, August 22nd 2019

How does GLJ's size impact its beta?

With a market capitalisation of €3.5b, Grenke is a pretty big company, even by global standards. It is quite likely well known to very many investors. It takes a lot of money to influence the share price of large companies like this one. That makes it interesting to note that its share price has a history of sensitivity to market volatility. There might be some aspect of the business that means profits are leveraged to the economic cycle.

What this means for you:

Beta only tells us that the Grenke share price is sensitive to broader market movements. This could indicate that it is a high growth company, or is heavily influenced by sentiment because it is speculative. Alternatively, it could have operating leverage in its business model. Ultimately, beta is an interesting metric, but there's plenty more to learn. In order to fully understand whether GLJ is a good investment for you, we also need to consider important company-specific fundamentals such as Grenke’s financial health and performance track record. I urge you to continue your research by taking a look at the following:

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  1. Future Outlook: What are well-informed industry analysts predicting for GLJ’s future growth? Take a look at our free research report of analyst consensus for GLJ’s outlook.

  2. Past Track Record: Has GLJ been consistently performing well irrespective of the ups and downs in the market? Go into more detail in the past performance analysis and take a look at the free visual representations of GLJ's historicals for more clarity.

  3. Other Interesting Stocks: It's worth checking to see how GLJ measures up against other companies on valuation. You could start with this free list of prospective options.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.