That's not correct. Margin on stock is 50% and for naked puts is 20%. When you adjust for all the in/out of the money and apply premium received, a covered call is approximately 2-3x as expensive, margin wise.Quote from xflat2186:
There is no such thing as a free lunch. The margin used to be naked short the deep put would be the same as if you laid out the money to buy the stock and sold the 40 call, there is no free money there. The dividend youâd collect is priced into the put and into the long stock plus short OTM call. You just crossed a bigger bid offer spread and gave someone else the option of exercising the put.
But you are correct in that there's no free lunch with one covered call versus one naked put. Everything is priced in.