So I recently learned that my bank give me 99% of a treasury as buying power in my margin account. When you sell a super deep itm puts it has -95 or greater delta. You get a large influx of cash. If you sell xsp or another European style option that has no early assignment for 3 years and then put all your cash into treasuries for 3 years to get 4% to 4.5% interest, is that not a significantly greater return than just buying stock with the same downside? Like right now you sell a $900 xsp put you would need 90k cash and would receive roughly $30000 in premium. Put that now 120k into a 3 year treasury and by the time you have to either buy out the option or buy the shares you would have received roughly an extra 16k/17k in interest?