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MCK put/call walls show support near $830 and resistance near $900.
McKesson Corp. — Where open interest creates price support and resistance
MCK put/call walls identify the strike prices with the highest open interest concentration, which often act as support and resistance levels for the underlying stock. The strongest put wall sits at $830 (support) and the strongest call wall at $900 (resistance).
Premium sellers use these wall levels to position short strikes near areas of high open interest, where price tends to slow or reverse. The current gamma exposure regime is negative, which can amplify moves and increase directional risk. Max pain — the strike where total option losses are minimized — sits at $860.
Wall levels are derived from current open interest positioning and update daily after market close. They can shift as options traders open or close positions. For context on how MCK options are priced overall, see the MCK IV analysis and MCK VRP analysis.
McKesson Corp. (MCK) is a Healthcare stock with actively traded listed options. Open interest concentrates at the $830 put wall (0.8K contracts) and $900 call wall (0.5K contracts) — 4.0% below and 4.1% above spot. Dealer hedging flows at these levels tend to dampen directional moves, reinforcing the wall corridor. This setup is more supportive of premium selling inside the wall range. MCK strategy builder.
Where options dealers' hedging flows create support and resistance — max pain at $860.
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.
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
McKesson Corp.'s current open interest profile shows relatively light concentration on both sides — put activity at $830 (847 contracts) and calls at $900 (466) 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.
McKesson Corp.'s current options landscape shows put support concentrated at $830 (847 contracts) with call resistance at $900 (466). This creates a $830–$900 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.
McKesson Corp. is trading near its gamma exposure flip point at $860.00, where the net GEX of -0.3B could shift between positive and negative regimes with a relatively small price move. This transitional zone is the most unpredictable for premium sellers — dealer hedging behavior can change direction rapidly, making realized volatility erratic. Consider waiting for GEX to firmly establish in one regime before initiating new positions, or use small-sized defined-risk trades that won't be significantly impacted by a regime shift.
Walls from nearest liquid expiry — these reflect short-term hedging activity and may not represent longer-term positioning.
McKesson Corp.'s options-defined support sits at the $830 put wall (847 OI), and resistance at the $900 call wall (466 OI). The full range is $830–$900, defined by the strikes where dealer hedging is concentrated.
McKesson Corp.'s strongest put wall (support) is at $830 with 847 open interest contracts, and the primary call wall (resistance) is at $900 with 466 contracts. This creates a trading range of $830–$900. Put positioning is heavier, suggesting stronger downside protection from dealer hedging.
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). McKesson Corp. is near its gamma flip point, so the effectiveness of these walls can change quickly. When GEX is positive, walls are reinforced by dealer hedging; when negative, walls become less reliable.
McKesson Corp.'s max pain at $860 is very close to the current price of $864.14. Max pain represents the price at which option holders collectively lose the most money at expiration. When price gravitates toward max pain (especially in the final days before expiration), it suggests that the cumulative hedging activity of dealers is creating a "pinning" effect. For premium sellers, max pain alignment is bullish — it indicates suppressed realized volatility near expiration, which is exactly what short options profit from.
Use the put wall at $830 as support for put credit spreads and the call wall at $900 as a ceiling for call credit spreads. The wall-to-wall range defines your expected trading corridor. 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.
McKesson Corp.'s put/call OI ratio of 1.82x indicates heavier positioning on the downside. This could reflect institutional hedging (fund managers buying puts for portfolio protection), elevated demand for downside insurance, or market-maker inventory from heavy put selling by retail traders. For premium sellers, put-heavy OI is generally favorable — it means more dealer support below the current price, creating stronger floors. However, if this hedge demand is driven by a genuine fundamental concern, the protection may be warranted.