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Is China Aviation Oil (Singapore) Corporation Ltd (SGX:G92) a good dividend stock? How can we tell? Dividend paying companies with growing earnings can be highly rewarding in the long term. If you are hoping to live on your dividends, it's important to be more stringent with your investments than the average punter. Regular readers know we like to apply the same approach to each dividend stock, and we hope you'll find our analysis useful.

A high yield and a long history of paying dividends is an appealing combination for China Aviation Oil (Singapore). It would not be a surprise to discover that many investors buy it for the dividends. Some simple analysis can offer a lot of insights when buying a company for its dividend, and we'll go through this below.

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Payout ratios

Companies (usually) pay dividends out of their earnings. If a company is paying more than it earns, the dividend might have to be cut. As a result, we should always investigate whether a company can afford its dividend, measured as a percentage of a company's net income after tax. China Aviation Oil (Singapore) paid out 30% of its profit as dividends, over the trailing twelve month period. This is a medium payout level that leaves enough capital in the business to fund opportunities that might arise, while also rewarding shareholders. One of the risks is that management reinvests the retained capital poorly instead of paying a higher dividend.

In addition to comparing dividends against profits, we should inspect whether the company generated enough cash to pay its dividend. China Aviation Oil (Singapore)'s cash payout ratio last year was 16%, which is quite low and suggests that the dividend was thoroughly covered by cash flow. It's encouraging to see that the dividend is covered by both profit and cash flow. This generally suggests the dividend is sustainable, as long as earnings don't drop precipitously.

While the above analysis focuses on dividends relative to a company's earnings, we do note China Aviation Oil (Singapore)'s strong net cash position, which will let it pay larger dividends for a time, should it choose.

Remember, you can always get a snapshot of China Aviation Oil (Singapore)'s latest financial position, by checking our visualisation of its financial health.

Dividend Volatility

From the perspective of an income investor who wants to earn dividends for many years, there is not much point buying a stock if its dividend is regularly cut or is not reliable. For the purpose of this article, we only scrutinise the last decade of China Aviation Oil (Singapore)'s dividend payments. This dividend has been unstable, which we define as having fallen by at least 20% one or more times over this time. During the past ten-year period, the first annual payment was US$0.012 in 2009, compared to US$0.033 last year. This works out to be a compound annual growth rate (CAGR) of approximately 11% a year over that time. The dividends haven't grown at precisely 11% every year, but this is a useful way to average out the historical rate of growth.