F.N.B. Corporation (NYSE:FNB) stock is about to trade ex-dividend in 3 days. The ex-dividend date is one business day before the record date, which is the cut-off date for shareholders to be present on the company's books to be eligible for a dividend payment. The ex-dividend date is of consequence because whenever a stock is bought or sold, the trade takes at least two business day to settle. In other words, investors can purchase F.N.B's shares before the 2nd of December in order to be eligible for the dividend, which will be paid on the 15th of December.

The company's upcoming dividend is US$0.12 a share, following on from the last 12 months, when the company distributed a total of US$0.48 per share to shareholders. Based on the last year's worth of payments, F.N.B has a trailing yield of 2.8% on the current stock price of US$17.16. Dividends are an important source of income to many shareholders, but the health of the business is crucial to maintaining those dividends. That's why we should always check whether the dividend payments appear sustainable, and if the company is growing.

Dividends are usually paid out of company profits, so if a company pays out more than it earned then its dividend is usually at greater risk of being cut. F.N.B paid out a comfortable 44% of its profit last year.

Companies that pay out less in dividends than they earn in profits generally have more sustainable dividends. The lower the payout ratio, the more wiggle room the business has before it could be forced to cut the dividend.

Click here to see the company's payout ratio, plus analyst estimates of its future dividends.

Have Earnings And Dividends Been Growing?

Stocks with flat earnings can still be attractive dividend payers, but it is important to be more conservative with your approach and demand a greater margin for safety when it comes to dividend sustainability. If business enters a downturn and the dividend is cut, the company could see its value fall precipitously. It's not encouraging to see that F.N.B's earnings are effectively flat over the past five years. It's better than seeing them drop, certainly, but over the long term, all of the best dividend stocks are able to meaningfully grow their earnings per share.

Many investors will assess a company's dividend performance by evaluating how much the dividend payments have changed over time. F.N.B's dividend payments are broadly unchanged compared to where they were 10 years ago.

The Bottom Line

Should investors buy F.N.B for the upcoming dividend? F.N.B's earnings per share are basically flat over the past five years, although it has the cushion of a low payout ratio, which would suggest a cut to the dividend is relatively unlikely. We think there are likely better opportunities out there.

Ever wonder what the future holds for F.N.B? See what the eight analysts we track are forecasting, with this visualisation of its historical and future estimated earnings and cash flow

If you're in the market for strong dividend payers, we recommend checking our selection of top dividend stocks.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.