What Is a Good IV for Selling Puts? Implied Volatility for the Wheel

Implied volatility (IV) is the single biggest reason one put pays $0.30 and another pays $2.00. For anyone running the Wheel, it decides how much premium you collect, how far below the price you can sell, and how likely you are to be assigned. This guide explains what IV actually measures, what a "good" IV for selling puts and covered calls looks like, how IV rank and IV percentile work, and why the highest IV is often a warning rather than an opportunity.

All numbers below are hypothetical, rounded, and calculated with a standard option pricing model (30 days, 4% interest rate, no dividends). They are not quotes, live prices, or typical results.

What implied volatility means

Implied volatility is the size of the yearly move the options market is pricing in, written as a percentage of the stock price. It is "implied" because nobody announces it: it is worked backward from what buyers and sellers are paying for the options right now.

A quick way to turn IV into dollars is the one-standard-deviation expected move:

IV is a forecast, not a promise. A stock can move far more or far less than its IV implied, and that gap is where option sellers make or lose their edge.

How IV changes the premium on a cash-secured put

Hold everything else the same and raise IV, and every put gets more expensive. That is the appeal for a seller. Here is the same $47 put on a $50 stock, 30 days out, at three IV levels:

The premium is almost six times larger at 60% IV, but so is the risk you are being paid for: the chance of being assigned roughly doubles, and the stock's expected swings are more than twice as wide. Higher IV is not free money. It is the market charging more because it expects more movement.

A fairer comparison: same risk, different IV

Most Wheel traders pick strikes by delta rather than by a fixed price. If you keep the delta near 0.16 to 0.17 and let the strike move, the picture changes:

At similar odds of assignment, higher IV still pays more, and it lets you sell further below the stock price. That is the real reason option sellers like elevated IV. The catch is that the stock is also expected to move further, so the strike that looks "far away" is not as safe as it looks. To compare premiums like these fairly across stocks and expirations, see how to compare Wheel premiums, and for the delta side, how to pick strikes and delta.

What is a good IV for selling puts?

There is no universal number. A 35% IV is unusually high for a broad index ETF, ordinary for many large tech stocks, and low for a small biotech. A useful answer has three parts:

1. High compared with the stock's own history. Judge IV against the same stock's past year, not against other stocks. That is what IV rank and IV percentile are for (below).
2. High compared with how much the stock is actually moving. If IV is 40% but the stock has really been moving at about 25% a year (its historical or realized volatility), the options look rich, which favors the seller. If IV is 40% and the stock has been moving at 50%, the premium is not generous at all.
3. High for a reason you accept. IV usually rises before earnings, during market sell-offs, and after bad news. Earnings you can plan around. A lawsuit, a failed drug trial or a going-concern warning is the market telling you something about the business.

As a rough rule of thumb, many option sellers prefer to sell when IV rank is above about 30 to 50, but only on stocks they would be happy to own at the breakeven price. On the Wheel, the stock comes first and the IV second. A rich premium on a stock you don't want is the most common way the strategy goes wrong; see how to choose Wheel stocks.

IV rank and IV percentile, worked out

IV percentile asks a slightly different question: on what share of trading days over the past year was IV lower than today? If IV was below 45% on 200 of the last 252 trading days, the IV percentile is about 79.

The two can disagree. If a stock spent one week at 60% IV during a crash and the rest of the year between 20% and 30%, a reading of 35% gives an IV rank of only 37.5, yet an IV percentile close to 100, because IV was almost never that high. When they differ a lot, the percentile is usually the better guide. Many brokers show both on the option chain or in a volatility tab.

IV for covered calls

After assignment, the same logic applies to the call side. Higher IV raises call premiums, which lowers your cost basis faster. It also means a bigger chance of a sharp rally that calls your shares away, or a sharp drop that leaves your calls nearly worthless and your shares below basis. If you were assigned during a sell-off, IV is often still high, and that can make it possible to sell a call at or above your basis that still pays a useful premium. Use the Wheel cost basis calculator to see where your real breakeven sits before choosing the call strike, and the covered calls guide for the mechanics.

IV crush and earnings

Implied volatility usually climbs into a known event, then drops sharply once the news is out. That drop, called IV crush, can take a large share of an option's value with it overnight. A put seller who is already short an option before the report benefits from the crush, but only if the stock does not gap through the strike. The premium you collected is the market's price for that gap risk, and on many stocks it is fairly priced. The Wheel around earnings guide covers whether to sell before, through or after a report.

When high IV is a warning sign

• The stock has already collapsed. A stock down 40% in a month may have 90% IV. The premium looks huge because the next 40% move is a real possibility.
• The options are thinly traded. High IV on an illiquid chain often comes with wide bid-ask spreads that take back much of the extra premium.
• It never comes down. Some stocks always carry very high IV because they always move a lot. That is not a temporary opportunity; it is the stock's normal risk.
• You are sizing up because of it. Bigger premium is not a reason to sell more contracts. Keep each position small enough to survive a large drop; see Wheel strategy risks.

A simple IV checklist before you sell

1. Would I be glad to own 100 shares at the breakeven (strike minus premium)?
2. Is IV high or low compared with this stock's own past year (IV rank or percentile)?
3. Why is IV where it is? Is there an earnings date or news event before expiration?
4. At the delta I normally sell, what strike and premium does this IV give me?
5. Is the return on cash secured worth it after the bid-ask spread? Check it in the free Wheel calculator.
6. If the stock falls by the full expected move and then some, can I still hold or roll calmly? See rolling options on the Wheel.

For the whole system around these decisions, from picking stocks to managing assignment, read Spin the Wheel, Cash the Checks (Kindle eBook). New to some of the terms on this page? The Wheel strategy glossary defines them.

FAQ

Educational only, not financial advice. Options involve risk.