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Costco — Where open interest creates price support and resistance
Costco (COST) operates in the Consumer Staples sector and has actively traded listed options. Open interest concentrates at the $920 put wall (1.7K contracts) and $1065 call wall (1.7K contracts) — 8.9% below and 5.5% above spot. Dealer hedging at these levels amplifies moves rather than containing them — wall boundaries are less reliable. Wider spreads or defined-risk setups may be more appropriate in this gamma regime. See Strategy Builder for trade setups.
Where options dealers' hedging flows create support and resistance — max pain at $960.
These levels show where price may find support or resistance based on open interest positioning. Large put walls can act as magnets; call walls can cap upside.
Use wall levels to pick strikes — sell puts near put walls, sell calls near call walls.
Wall = Strike with highest open interest concentration across expirationsOpen interest by strike, gamma exposure (GEX) profile, max pain calculation
ORATS open interest and gamma data, updated daily
Walls are based on current OI positioning and can shift as traders open/close positions. GEX assumes most OI is dealer-held — retail-heavy OI produces less hedging flow. Treat as context, not prediction.
Walls from nearest liquid expiry — these reflect short-term hedging activity and may not represent longer-term positioning.
OI change tracker (1-day), wall strength score, and GEX trend chart — in active development.
This data is free for all users. No paywall — just not built yet.
Quantitative screening, not investment advice. Verify with your broker. Disclaimer
Costco's current open interest profile shows relatively light concentration on both sides — put activity at $920 (1.7K contracts) and calls at $1065 (1.7K) are below average for this expiration cycle. Scattered open interest means dealer hedging flows are less concentrated, reducing the "wall" effect that typically pins price within a range. Premium sellers should treat current support and resistance levels as softer than usual — wider stop losses and smaller position sizes are appropriate until open interest builds at specific strikes.
Costco's current options landscape shows put support concentrated at $920 (1.7K contracts) with call resistance at $1065 (1.7K). This creates a $920–$1065 trading corridor that dealer hedging activity naturally reinforces. Compare this wall-to-wall range with the Expected Move to see how volatility-based ranges align with open interest boundaries.
Costco's gamma exposure has turned negative (+7.7B), indicating that dealer hedging is now amplifying price moves rather than dampening them. When GEX is negative, dealers must sell into declines and buy into rallies — the opposite of the supportive mean-reverting flow that premium sellers prefer. The GEX flip point at $1010.00 is the level where this regime would reverse. Until price reclaims that level, premium sellers should use defined-risk strategies (credit spreads over naked positions) and consider reducing position sizes to account for the elevated move amplification.
Costco's strongest put wall (support) is at $920 with 1.7K open interest contracts, and the primary call wall (resistance) is at $1065 with 1.7K contracts. This creates a trading range of $920–$1065. Open interest is relatively balanced between puts and calls, creating symmetric dealer hedging pressure.
Open interest walls represent concentrations of options positions at specific strikes. When dealers hold these positions, they must hedge by buying or selling shares as price approaches wall levels, creating natural support (put walls) and resistance (call walls). Costco's gamma exposure is currently negative, which means dealer hedging can actually amplify moves through wall levels rather than defending them. In negative GEX environments, walls are less reliable as support/resistance, so premium sellers should use defined-risk strategies.
Costco's net gamma exposure is 7.7B, meaning dealers are net short gamma and must hedge in the same direction as price movement — selling into declines and buying into rallies. This amplifies volatility rather than dampening it. The GEX flip point at $1010.00 is where this dynamic reverses. Negative GEX environments typically produce larger daily moves, which is unfavorable for premium sellers. Consider using credit spreads instead of naked positions, or wait for GEX to turn positive before adding new short premium exposure.
Costco's $920–$1065 range spans 14.4%, wider than average. This spread suggests open interest is distributed across distant strikes, which can mean the market is pricing in a larger potential move — possibly around an upcoming catalyst like earnings or an industry event. For premium sellers, wider ranges mean wall support and resistance are farther from current price, providing more breathing room but also less concentrated dealer hedging at any single level.
With negative gamma exposure, favor defined-risk credit spreads over naked positions — place short strikes at wall levels but use wings to cap risk in case walls break. Wall data is most useful for strike selection — placing short strikes at or outside major open interest levels means your trade has dealer hedging flows working in your favor. Monitor daily for wall migration as open interest shifts.