Six Numbers to Read Before Selling Any Option: Delta, IV, Cushion and What They Actually Mean

Selling options is trading probabilities, not predicting prices

Option sellers don't ask "will this stock go up or down?" They ask "what is the probability this stock reaches my strike?" That reframing is the entire game. And once you accept it, the six numbers below stop being jargon and start being the actual decision-making inputs.

1. Delta — reading the success rate backwards

Delta approximates the probability that an option finishes in-the-money. For a put seller, you flip that into:

• Delta 0.10 → ~10% chance of reaching strike → ~90% success rate
• Delta 0.20 → ~20% chance → ~80% success rate
• Delta 0.30 → ~70% success rate, but the premium is much fatter

Conservative traders live in the 0.10–0.15 band. More aggressive sellers run 0.20–0.30. The exchanges compute this number, so the math is reliable.

2. Implied Volatility (IV) — the fuel for premiums

IV is the market's forecast of how much the underlying will move. High IV means the market expects bigger swings, and that inflates premium. Higher IV = bigger paycheck for sellers.

But high IV is also a warning. The market is pricing more movement for a reason. Never read IV alone — always combine it with cushion and delta.

3. Cushion — the real safety net

Cushion is the distance between the current price and your strike. A 27% cushion means the stock has to fall 27% before it even touches your strike. When earnings or other event risk is in the window, this is the last line of defense.

Empirically, top-tier names rarely drop more than 18% on a single earnings miss. A 25%+ cushion absorbs almost all single-event risk on quality tickers.

4. Annualized ROI — putting weeks and months on the same ruler

A 7-day put paying 2% annualizes to roughly 104%. A 30-day put paying 3% annualizes to ~36%. Looking at raw premium, the second one looks bigger. Looking at capital efficiency, the first one is dramatically better. Annualized ROI is the only fair way to rank trades across different durations.

5. Next earnings date — the volatility calendar

IV spikes around earnings and so does premium. Gap risk also spikes. Beginners should usually avoid the two-week window around earnings. But with deeper cushion and only top-tier tickers, the earnings window can also be the most lucrative slot in the year.

6. Composite scores like the Diamond Score

A composite score compresses the previous five into a single number. A score over 5 is a strong sell candidate; below 5 is ordinary. Single-number decisions are dangerous on their own, but composites save a lot of time when you're comparing ten tickers side by side.

How they fit together

Reading the six metrics in isolation is how people get lost. In practice the order goes:

1. Cushion — is the strike far enough away?
2. Delta — does the success rate match my risk tolerance?
3. IV — is the premium juicier than usual?
4. Annualized ROI — is the capital lock-up worth it?
5. Earnings date — is there an event in this cycle?
6. Composite score — how does it rank against the other candidates?

Selling options well isn't betting on one ticker. It's filtering a list down to combinations that match your rules, then rotating capital through them. Once the numbers stop being jargon, the decision becomes mechanical.