Uncovered short options on certain cash-settled indexes will be calculated using 25%/15% instead of 20%/10%. The following symbols are held at the higher requirements: RUT, DJX, RVX, NDX, MNX, XSP, SPX, OEX, & XEO.

tastyworks does not recognize calendar spreads in cash-settled indexes. Any short option without a corresponding long option in the same expiration cycle will be treated as uncovered.