One Thing To Remember About The TransAlta Corporation (TSE:TA) Share Price

If you're interested in TransAlta Corporation (TSE:TA), 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. 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 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 TransAlta

What does TA's beta value mean to investors?

Zooming in on TransAlta, we see it has a five year beta of 1.77. This is above 1, so historically its share price has been influenced by the broader volatility of the stock market. If the past is any guide, we would expect that TransAlta shares will rise quicker than the markets in times of optimism, but fall faster in times of pessimism. 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 TransAlta fares in that regard, below.

How does TA's size impact its beta?

TransAlta is a small company, but not tiny and little known. It has a market capitalisation of CA$2.2b, which means it would be on the radar of intstitutional investors. 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:

Since TransAlta has a reasonably high beta, it's worth considering why it is so heavily influenced by broader market sentiment. For example, it might be a high growth stock or have a lot of operating leverage in its business model. In order to fully understand whether TA is a good investment for you, we also need to consider important company-specific fundamentals such as TransAlta’s financial health and performance track record. I urge you to continue your research by taking a look at the following:

1. Future Outlook: What are well-informed industry analysts predicting for TA’s future growth? Take a look at our free research report of analyst consensus for TA’s outlook.
2. Past Track Record: Has TA 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 TA's historicals for more clarity.
3. Other Interesting Stocks: It's worth checking to see how TA measures up against other companies on valuation. You could start with this free list of prospective options.

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.

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. Thank you for reading.