How it fits
Miss Lemon Toolkit
Run the math before the premium looks tempting.
Three hand-entry tools for options sellers: cash-secured put math, assignment size, and annualized premium return. Inputs stay in your browser.
Breakeven · cash required · premium return
Cash-Secured Put Calculator
Start here when you are checking a short put before opening risk.
Cash coverage · account weight · sleep pressure
Assignment Size Calculator
Use this when the real question is whether assignment would fit the account.
Period return · annualized read · risk warning
Premium Annualized Return Calculator
Compare premium across expirations without treating annualized return as a promise.
Privacy
The first version is deliberately local.
No brokerage connection, no account upload, no live option-chain pull. You type the numbers, Miss Lemon frames the risk, and the page keeps the calculation in the browser.