SPX 3D IV surface: six words, one working chart
Recorded in cvforge on June 19, 2026 by ConvexValue · Published July 25, 2026
"create a 3d iv surface for $SPX" produces a full rotatable surface — the shortest route from an idea to a working volatility chart in the library.
Exact prompt
create a 3d iv surface for $SPX
Data cadence
Live U.S. option snapshots, refreshed through the session. Open interest is an end-of-previous-day figure and updates once daily.
Plan requirements
Runs on the free cvforge app and the free data tier (20 requests/hour). No card needed.
Fields used
implied_volatility, strike_price, expiration_date, delta, underlying_price
How to read it
Six words, including the ticker. This one exists to show the floor of the interaction: no axis specification, no expiration range, no styling, and the result is still a usable surface.
Compare it with the point-cloud build on the same underlying to see how much the phrasing changes the output. Neither is more correct — one is smoothed and readable, the other shows only real contracts — and the difference came entirely from one clause in the sentence.
Change it
The prompt is the interface. Ask for a different ticker, a different expiration window, or an extra column in the same sentence style and the agent edits the app in place — you do not start over, and you do not wait for anyone to build it.
Limitations
- Snapshot data, not a transaction tape: the build reads the chain as it stands, so it cannot attribute a trade to a buyer or a seller.
- Open interest updates once a day, so an intraday volume/OI comparison is always this session’s volume against yesterday’s open interest.
- Contract coverage is U.S. listed equities, ETFs and indices. Indices use the I: prefix, for example I:SPX.
- Current per-contract valuation is Massive fair market value (FMV), a proprietary estimate. cvforge does not provide option bids, asks, midpoint, quote sizes, NBBO or last trades, and FMV is not an executable quote.
- The surface is drawn from listed strikes and expirations only; gaps between them are interpolation, not data.
- Low-volume, low-open-interest contracts can leave isolated implied-volatility observations that deserve less weight.
Related demos
- AMD IV curve with a volume/OI overlay you can filter
- The SPX volatility surface as points in 3D space
- A 3D SPY implied volatility surface in one line
Search focus: create a 3d iv surface. Related: spx vol surface chart, build iv surface from prompt. Originally posted on X.