Optionstradingiq iconOptionstradingiqSep 21, 2026

Why Some Brokers Don’t Allow Calendar Spreads On Indices (SPX vs SPY Explained)

A calendar option strategy is where the trader sells an option and buys another option with a further-dated expiration with the same strike. It is not obvious why some brokerages allow calendar spreads to be traded on SPY but not on SPX.

Why Some Brokers Don’t Allow Calendar Spreads On Indices (SPX vs SPY Explained)

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A calendar option strategy is where the trader sells an option and buys another option with a further-dated expiration with the same strike.

It is not obvious why some brokerages allow calendar spreads to be traded on SPY but not on SPX.

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A calendar option strategy is where the trader sells an option and buys another option with a further-dated expiration with the same strike. It is not obvious why some brokerages allow calendar spreads to be traded on SPY but not on SPX. By the end of the article, you will understand why.

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By the end of the article, you will understand why.

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