AAPL calendar call spread: selling time twice

Same strike, two expiries. The short Aug 28 call decays on a steep curve; the long Sep 18 call decays on a shallow one. The difference between those two decay rates is the entire profit engine — which is why the position wants the stock to sit still.

Max profit occurs with AAPL pinned at $310 on August 28, 2026: the short call expires worthless and you still own a 21-days-longer call. The engine values that peak at $537 against the $340 debit, which is also the maximum loss.

Calendars are LONG vega, unlike most short-premium trades. The back month has more vega than the front, so rising implied vol helps you. At 27% ATM on the front expiry, AAPL is the 16th richest of the 20 underlyings on this site — calendars are best opened when front-month vol is rich relative to the back.

Because the legs expire on different dates, there is no single expiry payoff: the numbers on this page are marked to model at the near expiry (August 28, 2026) using each leg's own implied vol — the same convention the builder uses.

Max loss is the $340 debit, but reaching it requires a big move. The more common outcome is a partial loss on a moderate drift, which is why calendars get managed rather than held.

Vol term structure can move against you: if back-month IV falls while front-month holds, the position loses on vega even with the stock exactly where you wanted it.

The decay is relentless and it is front-loaded against you in exactly the window most retail traders hold. A long-vol position with no exit plan is a slow, fully-predictable loss.

The straddle is priced by an options market that has watched this stock for twenty years, and it is rarely wrong by much. Long vol here works as a hedge on a portfolio that is already long Apple through an index, not as a standalone thesis.

AAPL's Aug 28 strikes are $5 apart near the money (1.62% of spot). Coarse enough that the strike you want frequently does not exist, and the nearest rung is a different trade. 32k contracts of open interest on Aug 28 is workable around the money and thin in the wings — width costs more here than the ladder suggests. 18 strikes on that expiry — 41% of the board — carry prints that agree with their own implied volatility and hold up across the ladder, and those are the strikes priced here. Penny-wide almost everywhere. If a spread will not fill near mid on Apple, the price is wrong, not the market.

Skew is inverted: the 25-delta CALL implies 1.7% more vol than the put. That is the market pricing upside risk above downside risk — a squeeze, a takeover rumour, or a crowded short. Owning upside on an inverted skew means paying the expensive side of the surface, which is worth knowing before you buy the call. The term structure is flat inside 1.5% between the two captured expiries, so there is no calendar edge to harvest and no event visibly priced into one month over the other.

At 27% ATM implied vol, the Aug 28 options are pricing a one-standard-deviation move of $22.60 over 27 days — roughly −7.3% to +7.3%, or $286.31 to $331.51. That is the number the long-vol trade above has to beat — not match. Breakevens sit outside it by construction, because you paid the spread as well as the vol.

What actually goes wrong here, as opposed to in general: Writing calls into a September product cycle at the same delta you used in July. The distribution changes; the delta table does not tell you that.