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Re:SoftBank unmasked as ‘Nasdaq whale’ that stoked tech rally by PhantomGremlin on Saturday September 05, 2020 @08:26PM (#24387914)
As a mm you don’t have to buy the underlying to cover short calls

Yes you're absolutely right.

The beauty of being a market maker is you only need to hedge across the entirely of your exposure to a particular equity. The more different options you sell on a particular equity, the easier it becomes to hedge your net exposure.

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