What does the Stillhalter Yield Check do?
This calculator estimates the annual return of a premium-selling setup such as short puts or short calls. It compares the premium you collect with your own assumptions for win rate, maximum loss and number of trades per year.
The tool is intentionally simple: it uses the numbers you enter instead of broker-specific market data. That keeps the assumptions editable and makes it easier to test conservative and optimistic scenarios side by side.
Try increasing the assumed loss, lowering the win rate or changing the premium per trade to see how quickly the return profile changes.