INTC 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 INTC pinned at $90 on August 28, 2026: the short call expires worthless and you still own a 21-days-longer call. The engine values that peak at $520 against the $236 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 85% ATM on the front expiry, INTC is the 1st 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.

Early assignment on the short call — particularly near an ex-dividend date — leaves you short 100 shares against a long back-month call. Manageable, but it turns a quiet position into a margin conversation.

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.

Implied vol can fall while the stock moves. Long-vol structures lose money in that scenario despite the thesis technically working, which is the single most common way these trades disappoint.

Intel's realized vol has repeatedly exceeded its implied on foundry and subsidy headlines that arrive without warning. That is the profile long-vol traders look for, and the reason the front month is not as expensive as the risk suggests.

INTC's Aug 28 strikes are $2 apart near the money (2.22% of spot). Coarse enough that the strike you want frequently does not exist, and the nearest rung is a different trade. 18k 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. 32 strikes on that expiry — 47% 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. Liquid near the money with a fine ladder; the far wings carry stale prints more often than the volume suggests.

Skew is inverted: the 25-delta CALL implies 6.5% 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 backwardated — Aug 28 implies 3.1% MORE vol than Sep 18. That is the signature of a dated event inside the front month, and it is the strongest argument for picking the expiry that sits behind it.

At 85% ATM implied vol, the Aug 28 options are pricing a one-standard-deviation move of $20.95 over 27 days — roughly −23.2% to +23.2%, or $69.25 to $111.15. Owning vol here means believing INTC covers more than 23.2% in 27 days, and covering it in time.

What actually goes wrong here, as opposed to in general: Reading a low share price as low risk. The percentage moves here are semiconductor moves; the dollar amounts just make them easier to underestimate.