Where to trade box spreads
Brokers that support multi-leg shorting of SPX / XSP box spreads. We have no commercial relationship with any of these — listed by capability, not by who pays us.
The de-facto retail venue for box spreads. Deep SPX/XSP liquidity, portfolio margin, native combo-order routing.
Publishes its own educational content using a short box spread on cash-settled SPX as a synthetic loan.
Full SPX / XSP chain with multi-leg support.
Supports complex multi-leg orders given the right options approval level.
Built around spreads; SPX / XSP boxes are routine — frictionless 4-leg combos.
Multi-leg index option spreads supported.
Multi-leg covers up to 4 legs — exactly what a box needs.
SPX, XSP, VIX index options with multi-leg orders. Short box workable with the right approval level.
Supports SPX, VIX, XSP. Custom strategy builder takes 2–4 options across expirations, which fits a box.
Advanced multi-leg strategies (straddles, condors, butterflies) plus SPX/NDX/VIX at Level 3+. Confirm whether the strategy builder explicitly exposes the 4-leg box template.
Disclosure. Listed for capability only. We have no current referral relationships with these brokers.
Eurex (ESTX50). European market access depends on the broker's product reach. Interactive Brokers, Saxo, and Lynx are the common venues for ESTX50 multi-leg combos in EU.