Dates and setting
The ex-dividend date determines who is entitled to the payment. All things being equal, the stock opens roughly discounting the dividend because that cash no longer belongs to the company. Taxation can reduce net income.
Payout and cash
The payout compares dividends with profit; For intensive businesses it is also advisable to compare it with free cash flow. A payment covered by debt, sale of assets or working capital is not sustainable indefinitely.
Example
FCF of 100 M and dividends of 70 M leave coverage of 1.43 times. If the FCF falls to 50 M, the same payment already consumes 140% of the cash.
Why a high yield can be a warning
Dividend yield = annual dividend / price. It can rise because the price collapses due to a probable cut. Review debt, maturities, cyclicality and capital policy before assuming that 10% is better than 3%.
Total return
Compare dividend, buybacks and reinvestment. A company with good opportunities can create more value by retaining cash; another mature woman can distribute it. What is important is total return per share and discipline in allocating capital.