The directional answer is only one input
A long call has a simple-sounding thesis: the stock rises, so the call should be worth more. That is true only if the rest of the option's inputs stay still. Around earnings they rarely do.
An option premium has two parts. Intrinsic value is the amount by which the stock is already above the strike. Time value is everything else: the market's price for the possibility that the stock moves further before expiration. Time value depends on how far the strike is from the spot price, how long is left, and how much movement the market expects.
Earnings change the third input abruptly. Before the report, the market knows a scheduled announcement will resolve a large, dated uncertainty. Option prices reflect that. Immediately after the report, that specific uncertainty is gone, even if the business remains uncertain in general. The time value that was paid for the event can fall faster than the stock rises.
This is why a trader can read the quarter correctly and still lose on the position. Direction was one variable. The premium had already charged for a meaningful move, and the repricing of that charge was the other variable.
A worked example: right on direction, wrong on volatility
The numbers below are illustrative, not a quote for any company. They use a Black-Scholes value with a zero interest rate and no dividends, a $100 stock, and an at-the-money $100 call. At entry the option has seven calendar days left and an 80% implied volatility, which prices it near $4.42. After the report it has three days left and implied volatility falls to 30%.
In the middle scenario the stock rises 3% to $103. The call is now $3 in the money, yet it is worth roughly $3.19 — a loss of about 28% on the $4.42 entry. The move was correct; the premium had priced a larger move and then repriced.
In the strong scenario the stock rises 4% and the call is worth about $4.10, still slightly below the entry. Only a move beyond the market's implied expectation, or a smaller volatility collapse, makes the long call pay.
This is not an argument that long calls always lose through earnings. It is an argument that the break-even is not "the stock goes up." The break-even is approximately the move the option market already charged, adjusted for how much volatility remains after the event.
| Scenario after report | Stock price | Implied volatility | Approx. call value | P&L vs $4.42 |
|---|---|---|---|---|
| Stock falls 2% | $98.00 | 30% | $0.33 | −93% |
| Stock rises 3% | $103.00 | 30% | $3.19 | −28% |
| Stock rises 4% | $104.00 | 30% | $4.10 | −7% |
Illustrative Black-Scholes values for a $100-strike call with three days remaining after the report, zero rate and no dividends. Entry: seven days remaining, 80% implied volatility, about $4.42. These are teaching numbers, not a market quote or a forecast.
Source: Options Whale illustrative calculation
The implied move is a break-even, not a target
The implied move is usually derived from the price of an at-the-money straddle: buy the call and the put at the same strike and expiration, and the total premium approximates the move the market needs to break even at expiry, ignoring costs and the fact that the position can be closed earlier.
That definition matters. The number is not a prediction that the stock will move by exactly that amount. It is not a ceiling or a floor. It is the size of move at which a simple option position roughly covers its own cost.
For a directional call, the relevant comparison is similar but not identical. The call's break-even at expiry is the strike plus the premium paid. If the stock finishes below that, the call expires worthless regardless of whether the company beat estimates. Before expiry, the mark-to-market result also depends on the remaining implied volatility and time.
This is why "the stock beat and went up 3%" can coexist with a losing call. The market may have priced a 6% move, the stock delivered 3%, and the volatility that supported the premium disappeared. The company delivered a good quarter; the option delivered a different payoff.
When holding through earnings can still be deliberate
None of this makes holding through earnings irrational. It makes it a specific position rather than a free option on good news.
A trader might hold a longer-dated call because the thesis is about a multi-quarter trend and the earnings event is only one checkpoint. In that case the event is a small part of the option's value, and a one-day volatility repricing matters less than the business trajectory. A trader might hold a short-dated position because the intended trade is precisely the event, accepting that the payoff depends on the size of the surprise relative to what was priced.
The mistake is mixing the two stories. A long-dated thesis held in a seven-day contract is usually a mismatch of time horizon. A short-dated event trade justified by "the company is good" is usually a mismatch of evidence.
It can also be reasonable to wait. If the reader's view is that the company will grow over the next year, the report will still be there tomorrow, and the option market will reprice. Waiting gives up the event payoff but also gives up the need to be right about the event's size and the volatility path. Doing nothing is a legitimate position when the priced move is larger than the view.
A practical checklist before holding a long option
- What does the premium imply? Compare the cost of the position with the implied move. If the stock must move more than your thesis expects, the trade is already priced against you.
- Which expiry contains the event? Check the announcement date and session. A contract that expires before the report is not an earnings trade.
- How much time value is left? Short-dated options are more sensitive to the volatility repricing; longer-dated ones dilute the event but cost more carry.
- What happens if the stock moves as expected but volatility falls? Value the position after the event, not only at expiry.
- What is the exit? Decide whether the plan is to close before the announcement, into the reaction, or at expiry. Each uses a different price and carries a different risk.
- What is the cost of being wrong? The maximum loss on a long option is the premium paid, but the probability-weighted cost includes the many small losses from paying elevated event premiums repeatedly.
A useful research habit is to write down the stock move that would make the position whole, then ask whether that move is the base case or the optimistic case. If it is the optimistic case, the option is not expressing the view — it is expressing a stronger version of it.
Bars start at zero; negative values extend left.
P&L on the illustrative $4.42 call in the table above, after implied volatility falls from 80% to 30%. Negative values mean the position lost money even when the stock rose.
Source: Options Whale illustrative calculation · Teaching example, not a market observation
View the data table
| Observation | Value |
|---|---|
| Stock −2% | -93.0% |
| Stock +3% | -28.0% |
| Stock +4% | -7.00% |
What to take away
An earnings report resolves a dated uncertainty, and option prices charge for that resolution in advance. When the report lands, the charge is removed. A directional view can be right and the position can still lose because the premium was a joint bet on direction, magnitude, timing and volatility.
The practical response is not to avoid options around earnings. It is to make the bet explicit: which expiry, which move is priced, what volatility assumption the position needs, and where the exit is. If those answers are unclear, the position is probably expressing a hope rather than a thesis.
For the mechanics of the volatility repricing, see what earnings IV crush is. For the straddle calculation behind the implied move, see how the earnings expected move is calculated.