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My mid is the current share price, spread is the bid/offer spread of the underlying, plus some to cover gap risk (eg if the stock touches 1000 and immediately gaps down to 900) plus the profit I can gouge them for.
That’s assuming I know they want to buy. If it’s a two way quote I need a wider spread to cover the risk of gapping from below 1000 to way above, in fact I probably want to lower the mid too.
