NVDA calendar call spread: selling time twice

Same strike, two expiries. The short Oct 30 call decays on a steep curve; the long Nov 20 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 $225 on October 30, 2026: the short call expires worthless and you still own a 21-days-longer call. The engine values that peak at $391 against the $445 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 32% ATM on the front expiry, NVDA is the 14th 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 (October 30, 2026) using each leg's own implied vol — the same convention the builder uses.

The loss shape is a tent: profitable near $225, 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 Oct 30 strikes are $5 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. 65k contracts of open interest on Oct 30 is workable around the money and thin in the wings — width costs more here than the ladder suggests. 21 strikes on that expiry — 100% 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 ordinary — the 25-delta put implies 2.5% more vol than the 25-delta call, about what an equity surface looks like when nothing unusual is being priced. Nothing on the surface argues strongly for one direction of structure over the other. The term structure is in contango: the back month implies 5.0% more vol than the front. Calm now, uncertainty later — which rewards selling the front month and makes the back month an expensive thing to own outright.

At 32% ATM implied vol, the Oct 30 options are pricing a one-standard-deviation move of $21.67 over 33 days — roughly −9.6% to +9.6%, or $203.4 to $246.74. 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.