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Anyone researching Beijing Tong Ren Tang Chinese Medicine Company Limited (HKG:3613) might want to consider the historical volatility of the share price. 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 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. 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. 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.
Check out our latest analysis for Beijing Tong Ren Tang Chinese Medicine
What 3613's beta value tells investors
With a beta of 0.91, (which is quite close to 1) the share price of Beijing Tong Ren Tang Chinese Medicine has historically been about as voltile as the broader market. Using history as a guide, we might surmise that the share price is likely to be influenced by market voltility going forward but it probably won't be particularly sensitive to it. Beta is worth considering, but it's also important to consider whether Beijing Tong Ren Tang Chinese Medicine is growing earnings and revenue. You can take a look for yourself, below.
How does 3613's size impact its beta?
Beijing Tong Ren Tang Chinese Medicine is a small company, but not tiny and little known. It has a market capitalisation of HK$12b, which means it would be on the radar of intstitutional investors. It takes less capital to move the share price of small companies, and they are also more impacted by company specific events, so it's a bit of a surprise that the beta is so close to the overall market.