Price, yes. Margin no.
The closer the stock gets to $5000, the LOWER your margin requirement and the lower your chances of early exercise. The margin requirements reflect that change.
Sure the IV affects the price of the option, but when your stock goes from $100 to even $150, the premium decay will far outstrip the rise in IV. Show me a broker that will INCREASE your margin on a sold put as the underlying moves from $100 to $150. I say it's impossible to have any SIGNIFICANT move AWAY from your strike (in the seller's favor) and have the margin requirements increase. I have been selling options since the mid 80s, and I have never seen it happen.
IV plays into the formula, but not near as much as the underlying price.
The closer the stock gets to $5000, the LOWER your margin requirement and the lower your chances of early exercise. The margin requirements reflect that change.
Sure the IV affects the price of the option, but when your stock goes from $100 to even $150, the premium decay will far outstrip the rise in IV. Show me a broker that will INCREASE your margin on a sold put as the underlying moves from $100 to $150. I say it's impossible to have any SIGNIFICANT move AWAY from your strike (in the seller's favor) and have the margin requirements increase. I have been selling options since the mid 80s, and I have never seen it happen.
IV plays into the formula, but not near as much as the underlying price.