NVDA 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 NVDA pinned at $200 on August 28, 2026: the short call expires worthless and you still own a 21-days-longer call. The engine values that peak at $637 against the $275 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 46% ATM on the front expiry, NVDA is the 7th 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.

The loss shape is a tent: profitable near $200, losing as NVDA moves either way. A large move in EITHER direction costs money — calendars are short gamma even though they are long vega.

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.

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.

Front-month NVDA vol into a print is the most expensive real estate on this site, and the crush afterwards is violent and immediate. The straddle needs a move larger than the one everybody already expects, which on this name is a high bar. Calendars that sell the print and own the month after are the more considered version of the same view.

NVDA's Aug 28 strikes are $5 apart near the money (2.49% of spot). Coarse enough that the strike you want frequently does not exist, and the nearest rung is a different trade. 114k contracts of open interest on Aug 28 is deep enough that multi-leg orders fill near mid at retail size. 24 strikes on that expiry — 50% 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. Enormous volume and open interest; complex structures fill near mid even in size, including through the print.

Skew is inverted: the 25-delta CALL implies 2.1% 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 2.9% 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 46% ATM implied vol, the Aug 28 options are pricing a one-standard-deviation move of $25.16 over 27 days — roughly −12.5% to +12.5%, or $175.59 to $225.91. 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.

The mistake this name punishes hardest: Sizing a short-premium NVDA position off the credit rather than off the gap. The credit is large because the gap is large.