- Assignment
- The moment a seller is obligated to honor the contract — to buy shares (short put) or deliver shares (short call). Usually automatic, often over a weekend.
- At-the-money (ATM)
- An option whose strike is right at the current stock price.
- Breakeven
- The stock price at which a position makes neither profit nor loss. For a cash-secured put, it is the strike minus the premium collected.
- Call option
- The right to BUY 100 shares at the strike before expiration. Call buyers are bullish.
- Cash-secured put
- Selling a put while setting aside the full cash to buy the shares if assigned. The friendly, beginner-appropriate way to sell puts.
- Covered call
- Selling a call against 100 shares you already own. Collects income; caps upside.
- Credit
- Cash you receive when you sell. “Selling for a credit” means money comes in.
- Delta
- Roughly, how much an option’s price moves per $1 move in the stock; also a rough probability of finishing in-the-money. A seller’s odds dial.
- Expiration (DTE)
- The deadline of the contract. Sellers favor 30–45 days to expiration.
- In-the-money (ITM)
- An option with intrinsic value: a call below the stock price, or a put above it.
- Naked (uncovered)
- Selling an option without the offsetting shares (call) or full cash (put). High or unlimited risk; not for beginners.
- Out-of-the-money (OTM)
- An option with no intrinsic value yet — the safe zone a seller usually sells into.
- Premium
- The price of the option; the cash the seller collects and the buyer pays. One contract = 100 shares, so a $2.00 premium is $200.
- Put option
- The right to SELL 100 shares at the strike before expiration. Put buyers are bearish or buying insurance.
- Rolling
- Closing an existing short option and opening a new one further out in time (and possibly a different strike), ideally for a net credit.
- Strike price
- The agreed price at which shares change hands if the option is exercised.
- Theta
- Time decay — the daily erosion of an option’s value. The seller’s paycheck.
- The Wheel
- The strategy of cycling cash-secured puts and covered calls to collect premium continuously.
- Vega
- Sensitivity to volatility. When volatility rises, premiums rise; sellers are paid more (but risk is higher).
- Volatility risk premium
- The persistent tendency of options to be priced for more movement than usually occurs — the structural edge sellers harvest.