If you own shares in Aircastle Limited (NYSE:AYR) 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 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. Any stock with a beta of greater than one is considered more volatile than the market, while those with a beta below one are either less volatile or poorly correlated with the market.
What AYR's beta value tells investors
Looking at the last five years, Aircastle has a beta of 1.51. The fact that this is well above 1 indicates that its share price movements have shown sensitivity to overall market volatility. If this beta value holds true in the future, Aircastle 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 Aircastle fares in that regard, below.
Could AYR's size cause it to be more volatile?
Aircastle is a small cap stock with a market capitalisation of US$1.7b. Most companies this size are actively traded. It's not particularly surprising that it has a higher beta than the overall market. That's because it takes less money to influence the share price of a smaller company, than a bigger company.
What this means for you:
Beta only tells us that the Aircastle 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. This article aims to educate investors about beta values, but it's well worth looking at important company-specific fundamentals such as Aircastle’s financial health and performance track record. I highly recommend you dive deeper by considering the following:
- Future Outlook: What are well-informed industry analysts predicting for AYR’s future growth? Take a look at our free research report of analyst consensus for AYR’s outlook.
- Past Track Record: Has AYR 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 AYR's historicals for more clarity.
- Other Interesting Stocks: It's worth checking to see how AYR 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 email@example.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.