Most Traders Don't Know There's a Smaller Version of SPX Options. Tom Preston Shows the Difference.

SPX

The trader is executing a short put spread on SPX with a zero DTE, aiming to collect a credit of $2.20. The trade is based on the linear relationship between option prices and underlying prices, where the SPX index is 10 times larger than the XSP index, resulting in option prices that are also 10 times larger. The trade is considered valid as long as the underlying price remains within the spread range.

XSP

The speaker suggests selling a put spread on XSP with a 25 cent credit, offering a max profit of $25 and a max loss of $75. This trade is preferred over SPX due to lower risk, even though the potential profit is lower. The trade is suitable for traders who are more comfortable with lower risk and want to avoid the higher risk associated with SPX options.

Linear Relationship Between Option Prices and Underlying Prices

The price of an option is linearly related to the price of its underlying asset, assuming all other factors (such as volatility, days to expiration, and cost to carry) are held constant. This means that if one asset is 10 times larger than another, the option prices for the larger asset will also be 10 times larger, provided the other factors are the same. This principle helps traders understand and compare option trades across different assets.

Risk Management in Index Options Trading

The speaker emphasizes the importance of aligning trade risk with personal comfort levels. Choosing between XSP and SPX options involves evaluating the maximum risk and potential profit, with XSP offering lower risk and SPX allowing for higher risk with potentially greater rewards. The trade-off is a lower potential profit in XSP versus higher profit in SPX, but with increased risk.

Why is the linear relationship between option prices and underlying prices important?

The linear relationship helps traders compare option trades across different assets and understand why option prices vary between products. It also aids in decision-making about which products to trade based on their size and underlying price.

TakeawayTraders should consider the linear relationship when comparing option trades across different assets to make informed decisions.

Why would I do XSP versus SPX first of all?

The speaker explains that XSP offers lower risk compared to SPX, with a max profit of $25 and a max loss of $75 for a put spread, while SPX has a higher max profit of $420 but a higher max loss of $580. The choice depends on the trader's risk tolerance and comfort level.

TakeawayTraders should choose between XSP and SPX based on their risk tolerance, with XSP being more suitable for those who prefer lower risk.