The Earnings Trader's Playbook: Expected Move, IV Crush, and Sizing

Why professional options sellers make more during earnings season than professional options buyers, and how to trade the reaction instead of guessing the report.

Every quarter, the market puts on the same show. Companies report. Stocks gap. Options premiums swell into the report and collapse the moment it is out. Retail traders load up on cheap calls or cheap puts, guess a direction, and hope the move is big enough to matter.

Most of them lose. Not because they were wrong about direction. Many were right. They lose because the mechanics of options pricing around a known event are built to punish buyers and reward sellers, and most retail traders never learn the mechanics.

This piece is the mechanics.

The professional approach to earnings has three moving parts. The expected move, which tells you the range the market is pricing in for the report. Implied volatility, which is the fuel that makes options rich before the report and thin after. And position sizing, which is the discipline that keeps you in the game long enough for the first two to matter.

Get all three right and earnings season becomes one of the higher-edge periods on the calendar. Get any of them wrong and it becomes an expensive lesson.

The Expected Move

The expected move is the range the options market is pricing in for the stock, from now through a given expiration. It is not a directional forecast. It is a magnitude estimate, derived from the price of at-the-money options.

The simplest way to read the expected move: the at-the-money straddle for the expiration covering earnings, priced in dollars, is approximately the one-standard-deviation expected move.

If a stock is trading at $200 the day before earnings and the at-the-money straddle (the $200 call plus the $200 put) for the Friday expiration is priced at $7.00 total, the market is pricing in roughly a $7 move by Friday. That gives you an approximate range of $193 to $207.

Most brokerage platforms display this directly on the options chain. Thinkorswim, Tastyworks, and Interactive Brokers all show it. If you want the theoretical version, the formula is:

Expected Move = Stock Price × Implied Volatility × √(days to expiration / 365)

For the same $200 stock with a 30 percent IV and 5 days to expiration, that works out to about $7. Both approaches produce the same answer because they are describing the same thing from different angles. The straddle price is the market's aggregated dollar estimate. The formula backs into the same estimate from implied volatility.

The critical thing to understand: the expected move is not a prediction. It is a one-standard-deviation range, which by construction covers roughly 68 percent of possible outcomes. That means, on average, one earnings report in three finishes outside the expected move. Your job as a seller is to structure trades that survive that one in three.

IV Crush: The Mechanic That Rewards Sellers

Implied volatility rises into earnings. It has to. Traders know a big move is possible, and demand for options from hedgers, speculators, and dealers pushes premium up in the weeks and days before the report.

The moment earnings are released, IV collapses. Regardless of what the stock did. This is IV crush, and it is the single most important dynamic to understand about earnings-based options trading.

Here is what it means in practice. If you bought a call before earnings expecting the stock to rally, and the stock rallied but not as much as the pre-earnings IV implied, your call can lose value even though you were directionally correct. The premium you paid included a volatility component, and that component evaporated when the report was released.

If you sold a call before earnings, the same collapse works in your favor. The option you sold for $5.00 in high-IV territory may be worth $2.00 the moment the report drops, even if the stock finished exactly where it started.

This is why professional options traders sell premium into earnings, not buy it. The implied volatility mechanics piece walks through this dynamic in more depth. You are the insurance company. Retail buyers are the insured. The insurance business is not built on guessing which houses burn down. It is built on collecting premium reliably enough that the occasional payout is affordable.

Three Strategies That Work Around Earnings

The Iron Condor

The iron condor is the workhorse earnings trade. You sell an out-of-the-money call spread and an out-of-the-money put spread, both positioned outside the expected move.

Structure: sell a call spread at strikes above the expected move upper bound, sell a put spread at strikes below the expected move lower bound. Defined risk. Positive theta. Benefits from both time decay and IV crush.

Best conditions: IV rank above 50, a well-defined expected move, and an underlying with tight bid-ask spreads on the options. You want the market to be paying you enough for the risk you are taking. The iron condor strike selection guide covers how to place the wings in more detail.

The Short Strangle

Higher reward, undefined risk. Sell an out-of-the-money call and an out-of-the-money put, without the protective wings.

Best when you have high conviction that the market is overpricing the expected move and you have the sizing discipline to survive a rare tail event. Not a starter trade. It belongs in the toolbox of experienced sellers who have accepted that the occasional undefined-risk loss is the cost of the strategy.

If you cannot afford to take a loss five times the premium you collected, you should not be selling naked strangles. Convert it to an iron fly or a jade lizard if that risk exceeds your comfort.

The Put Credit Spread

If you have a directional bias, meaning you think earnings will be fine and you just do not want to chase upside, a put credit spread just below the expected move is often the cleanest expression of that view.

Sell a put with 0.20 to 0.30 delta, buy a put five or ten strikes below as the wing. Positive theta, defined risk, and if IV is elevated you also collect the volatility premium that will collapse after the report. The put credit spread primer walks through the mechanics if this is your first time structuring one.

A Worked Example: The Iron Condor on an Earnings Report

Numbers make this concrete. Consider a historical snapshot from a large-cap payment processor going into earnings. The stock is trading at $333. The expected move for the expiration covering earnings is approximately $15.61 in either direction, which gives an expected range of roughly $317 to $349.

Look at the recent earnings reactions on this name and the range is narrower than the expected move suggests. Historical reactions have run from roughly a 4.5 percent decline to about an 8 percent gain. That is meaningful. The recent history is telling you the market is pricing more magnitude than history has delivered.

IV rank is just under 50 and will most likely push above 50 as we move closer to the report. Elevated IV, defined expected move, historical reactions inside the expected range, and an underlying with liquid options. The setup is coming together.

The trade: a short iron condor with the wings placed outside the expected move.

• Sell the $355 call, buy the $360 call

• Sell the $310 put, buy the $305 put

Credit collected: approximately $1.00. Maximum risk: $4.00 (the $5 spread width minus the $1 credit). Return on risk: 25 percent if held to expiration inside the range.

Breakeven range: $309 on the downside, $356 on the upside. That gives a 47-point profit range on a stock whose expected move is 30 points, positioned so the trade wins on any outcome inside a range materially wider than history has delivered.

Probability of profit at open, based on delta-derived approximations, is roughly 87 to 89 percent per side. Both outcomes assume the trade is closed shortly after the earnings release, which is the whole point of the setup. You are capturing the IV crush, not the theta decay. Take the profit, do not hang around waiting for time decay when the volatility gift has already been paid.

The specific strikes and premium change with each name and each earnings cycle. The relationships do not.

Position Sizing: The Discipline

Earnings trades are binary and short-tenor. They compress the risk of a normal options position into a two- or three-day window. Sizing has to reflect that.

The rule I use, and every practitioner I respect uses some version of it:

• Defined-risk earnings trades (iron condors, credit spreads): 1 to 2 percent of total capital per trade

• Undefined-risk earnings trades (naked strangles, straddles): 0.5 to 1 percent maximum, unless hedged

On a $100,000 account, that means an iron condor with $400 of risk is at most 2 contracts. A short strangle with undefined risk is 1 contract, ideally converted to a defined structure. A put credit spread with $800 of risk is 1 to 2 contracts maximum.

The framework is the same one that runs through the delta dollars sizing piece: think in risk units, not in contracts. The question is never "how many can I sell." The question is "how much can I risk." Every earnings cycle contains at least one report that moves twice the expected move and cracks the iron condor. If a single one of those losses can meaningfully damage the account, the sizing was wrong before the trade was on.

Two contracts of well-defended risk beats twenty contracts of naked premium every earnings season.

The Bottom Line

Trading earnings is not about being right on the report. It is about being right on the pricing.

The market prices a range. The range is calibrated by implied volatility. IV is elevated because everyone knows a big move might happen, and it collapses the instant the report is released. The professional trade is not to guess whether the report is a beat or a miss. It is to sell the elevated volatility to the traders doing the guessing and let the IV crush do the work. The Options Industry Council reference on the short iron condor walks through the official version of the mechanics.

The framework is repeatable. Read the expected move. Assess the IV level relative to its historical range. Pick the structure that fits the setup: iron condor for the standard high-IV rangebound trade, put credit spread for a directional lean, short strangle only when both your conviction and your sizing are real. Size to risk, not to contracts. Close after the crush.

Do that every quarter, on the names where the setup actually presents itself, and earnings season stops being a source of anxiety and becomes a source of edge.

Trade Smart. Trade Thoughtfully.

Andy Crowder.

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