Update: More Accurate SPX Pricing is Available

With the help of our colleagues at ORATS, we’ve made a major enhancement to how SPX cash pricing data is served inside Tradier. This is an important update that impacts all existing SPX index options traders. We will first roll it out to all Tradier Pro (Desktop) users, with a broader rollout to all other traders to follow shortly after.

SPX, and other indices like RUT, VIX, and NDX, will be powered by a more precise, model-driven feed derived from the ORATS API.

What’s changed
Tradier will now use a derived SPX value based on call-put parity and other inputs, rather than relying solely on the traditional spot price. ORATS calculates forward SPX values in real time using live options market data. This results in a forward-looking price that better reflects true market consensus—automatically adjusted for dividends and risk-free interest rates.

Why it matters
If you’re one of the thousands of active traders at Tradier trading volatility, or deploying delta-neutral strategies, this change brings a big advantage. It’s real-time, efficient, and reflects what the market truly believes SPX is worth at that moment, naturally adjusted for dividends and the risk-free interest rates.

"Theoretical option pricing should be based on the forward price—not the spot cash index value. That’s what pro options traders use, and now you’ll have access to it directly inside your Tradier tools." - Lex Luthringshausen, Head of Education and SVP of Strategic Partnerships at Tradier

Expect tighter, more responsive data that mirrors real market dynamics. You might notice the new derived SPX price differs slightly from the raw spot price—but this is natural due to the calculation using put-call parity.

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