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 the browser.
Three different questions before one seller decision.
The tools separate contract math, account capacity, and return comparison so an attractive annualized number cannot hide a cash or assignment problem.
- Cash-Secured Put: breakeven, cash required, assignment shares, and period return
- Assignment Size: cash coverage, account weight, holding horizon, and sleep pressure
- Annualized Premium: period return, annualized comparison, and risk warnings
Cockpit first. Calculator second. Playbook for the full frame.
A calculator can tell you what one contract does to cash. It cannot tell you whether the market, event window, underlying, liquidity, or ownership plan is good enough.
Use the cockpit for context, the calculator for arithmetic, and the library for the decision framework.
The first version is deliberately local.
There is no brokerage connection, account upload, or live option-chain pull. You type the values, the browser stores the local working state, and Miss Lemon frames the result without receiving the account inputs.
Clearing browser storage can remove saved inputs. Do not treat local persistence as a permanent record.
The math compares inputs; it does not choose a trade.
Annualized return is a comparison convention, not a promised yield. The calculators do not model every path, tax, margin rule, early assignment, dividend, execution cost, or broker treatment.
Verify contract specifications and use position sizes that can survive an unfavorable outcome.
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