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If you're interested in Strong Petrochemical Holdings Limited (HKG:852), 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 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 mimic the volatility of the market quite closely, while others demonstrate muted, exagerrated or uncorrelated price movements. Some investors use beta as a measure of how much a certain stock is impacted by market risk (volatility). While we should keep in mind that Warren Buffett has cautioned that 'Volatility is far from synonymous with risk', beta is still a useful factor to consider. To make good use of it you must first know that the beta of the overall market is one. A stock with a beta greater than one is more sensitive to broader market movements than a stock with a beta of less than one.

See our latest analysis for Strong Petrochemical Holdings

What 852's beta value tells investors

Looking at the last five years, Strong Petrochemical Holdings has a beta of 1.18. The fact that this is well above 1 indicates that its share price movements have shown sensitivity to overall market volatility. Based on this history, investors should be aware that Strong Petrochemical Holdings are likely to rise strongly in times of greed, but sell off in times of fear. 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 Strong Petrochemical Holdings fares in that regard, below.

How does 852's size impact its beta?

Strong Petrochemical Holdings is a rather small company. It has a market capitalisation of HK$913m, which means it is probably under the radar of most investors. It has a relatively high beta, suggesting it is fairly actively traded for a company of its size. Because it takes less capital to move the share price of a small company like this, when a stock this size is actively traded it is quite often more sensitive to market volatility than similar large companies.