# SWVXX and Cash Secured Puts

If using SWVXX to back Cash Secured Puts, note there is a subtlety with this at Schwab. Free cash is used up first for the puts, and SWVXX is only used as a contingency *if no cash is available*. This means you could have a cash balance and still not be able to withdraw cash without incurring a margin loan and interest.

See [this Reddit post](https://www.reddit.com/r/Schwab/comments/1r92jf7/swvxx_for_cash_secured_puts_and_unavailable_cash/).