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Options 101
What Is Pin Risk?
Pin risk is the coin-flip uncertainty of an option that closes exactly at its strike — will it be exercised or not? For sellers, that ambiguity is a real hazard.
NoVo Options Trading · 2026
Educational only, not tax, legal, or financial advice. Rules vary by broker and situation — verify specifics with your broker or a professional.
Pin risk is the uncertainty a trader faces when the underlying closes right at an option’s strike at expiration — leaving it unclear whether the option will be exercised. It mainly affects sellers.
What it is
When SPY closes exactly at a strike (say $600.00 with a $600 option), the option is right on the ITM/OTM boundary. It might be exercised or not — and the seller doesn’t know until after the close whether they’ll be assigned stock. Worse, after-hours moves in SPY can flip the option ITM or OTM, so a seller can wake up unexpectedly long or short shares.
Who it affects
Pin risk is a seller’s problem — the uncertainty of not knowing your assignment (and thus your resulting position) when price pins the strike. It’s heightened around the pins that charm flows create, precisely because price gravitates to big strikes into expiration. Buyers face the milder version: an option worth almost nothing either way.
Pin risk is the “is it in or out?” limbo of a strike-pinned expiration — and for a seller, that ambiguity can mean an unexpected overnight stock position.
What it means for a scalper
As a long-option scalper who closes before the bell, pin risk barely touches you. It’s a real concern for premium sellers holding to expiration near a heavy strike. The cleanest avoidance is simply not holding to expiration — which NoVo’s approach does by default.
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NoVo is a software tool for market analysis and for executing trades you initiate, not financial advice. This article is general education, not investment advice. Options trading involves substantial risk of loss, up to and including your entire capital. NoVo makes no guarantee of profit, win rate, or performance, and past results do not predict future outcomes. You are responsible for your own broker account, configuration, and trading decisions.