Investors don't hedge the idiosyncratic risk in their individual positions, because that's the risk they want exposure to. Ie, it's why they bought that specific stock.
The finance term "hedge" is misunderstood and misused by new investors and speculators. It's a simple concept, but not intuitive.
The "greater your core, the smaller your hedge", is nonsense in every literal, figurative, theoretical, and practical sense.
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