Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why won't my retirement account let me write a “covered put”?
I have a Roth IRA with Scottrade, and they allow me to write cash secured puts, as well as covered calls. I can also purchase calls or puts, if I choose. When I write a cash secured put, it automatically deducts the amount required to purchase the shares at the strike price from my "cash available for transactions".