<<< Most people who get killed in the market don't get killed simply because their stocks drop,.... because stocks can eventually recover.
They get killed because they are on "excessive" margin, and now because of the stock drop, they can not wait for recovery.
They are forced to sell at a loss, at the worst possible time.
The potential to borrow cash without being charged any fees, tempts naked put sellers to borrow more cash then they might normally borrow. >>>
Just as a side note.... many, if not most, "bull put spread traders", are also on super massive POTENTIAL margin, but don't even know it.
In fact, their potential degree of being on margin, makes naked put sellers look conservative by comparison.
And just like naked put sellers, there is no charge for the additional risk they expose their accounts to.
Hence, many ignore the potential risk..... UNTIL their stocks drop.
However, unlike naked put sellers, spread traders won't be getting any margin calls to worry about.
Instead, in the event of a severe market drop, their account value may quietly be devastated or wiped out, without any worries about a margin call.
WHY?
Because they won't be on any margin, unless they attempt to buy their stocks. Since most spread traders can't buy 80% of their stocks, if they drop to or between their strikes, no attempt to buy them will be made.
Hence, once their stocks drop to or between their strikes, they must close their spread trades for a potential loss.
And the negative affect on their account value will be massive in many, if not most cases.
How massive mostly depends on where "between" their strikes, they closed the spread trade,.
And close the spread trades they will, as most do not have the cash to buy 80% of the stocks they invested in.
(Of course, the above assumes a portfolio composed of only spread trades.)