Cash-Secured Put (CSP) Calculator

Use this calculator to estimate return from selling a cash-secured put. Enter the strike, premium, shares (typically 100), and expiration. We compute:

Total premium income (credit × shares)
Conservative cash required (strike × shares)
ROI and annualized APR (based on conservative cash)
Break-even stock price and downside protection %

Note: Some brokers offset cash by the credit; we show that amount for reference.

Cash-Secured Put ROI & APR Calculator

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