Opening and closing an iron condor means commission on eight legs — every round trip. Slippage is the variable tax on a 0DTE iron condor — it scales with the spread and the speed of the tape. Commission is the other tax, and it behaves differently. It’s flat, it’s certain, and it lands the same whether the market is calm or violent. You pay it to open and you pay it to close, every single trade, forever. ...
A four-legged fill rarely lands at the mid. The gap you give up is slippage. On paper, a 0DTE iron condor looks clean. You sell four legs, collect a credit, and let theta do the work. The decay curve is steep, the math is tidy, and the expected value pencils out. Then the fills come back, and the credit is smaller than the screen promised. ...
A focused guide to the 0DTE SPX iron condor: the exact rules a mechanical system runs, why entry time matters more than people think, and how to size and manage the risk.
Zero days to expiration (0DTE) options have become one of the most actively traded instruments in the modern market. On a typical trading day, 0DTE SPX options account for more than 40–50% of all SPX options volume. The reason is simple: the theta decay is at its most powerful, the mechanics are well-defined, and for systematic sellers, the daily reset provides a clean, repeatable trading cycle. This guide covers everything you need to know to understand, evaluate, and trade 0DTE options — especially the iron condor approach on SPX. ...
Every day that passes, options lose value. For buyers, this is the silent killer of their positions. For sellers, it is a reliable, day-by-day income stream. Understanding why option selling has a structural edge — and how to harness it — is the foundation of serious, systematic options trading. The Fundamental Asymmetry Options are priced to include a premium for uncertainty — what the market calls implied volatility (IV). Historically, options tend to be overpriced relative to the actual movement that occurs. This gap between implied and realised volatility is known as the volatility risk premium (VRP) — and it consistently flows from buyers to sellers. ...