A stock whose yield looks unusually generous only because the price has already collapsed, or because a one-off special dividend inflated the trailing total. Yield is a ratio, so a falling price raises it automatically without the company having become more generous. The tells are a payout ratio near or above 100%, a yield far above the sector's, and a share price in sustained decline. This is why the highest yield on the screener is a question to investigate, not a result to act on.
See every term in the full PSE investing glossary.