SMMT Options Key Levels — 2026-10-16 Expiration
As of 2026-09-30 20:17 ET, Summit Therapeutics (SMMT) max pain for the 2026-10-16 expiration is $14 with the stock at $17.27; dealers are in positive gamma (net GEX 222.4K); options imply a ±29.82% move by expiration.
| Spot price | $17.27 |
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| Max pain | $14 |
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| Gamma flip | No flip (net GEX does not change sign) |
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| Call Wall | $18 (4,023 open interest) |
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| Put Wall | $13 (895 open interest) |
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| Net gamma exposure (GEX) | 222.4K — positive gamma |
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| Implied move | ±29.82% (±$5.15) |
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| At-the-money implied volatility | 120.8% |
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| Put/call open interest ratio | 0.27 |
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| Call / put open interest | 15,522 / 4,244 |
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| Call / put volume | 326 / 32 |
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What is SMMT max pain today?
$14 for the 2026-10-16 expiration, 18.9% below the current price of $17.27.
What is SMMT gamma exposure (GEX)?
Net GEX is 222.4K (positive gamma).
Where are the SMMT call wall and put wall?
Call wall $18 (resistance), put wall $13 (support).
SMMT Dealer Positioning Insights
- Positive Gamma Environment — Dealers are long gamma — they buy dips and sell rips, dampening moves. Expect mean-reversion and range-bound trading.
- Low Put/Call OI Ratio (0.27) — Call open interest dominates, indicating bullish positioning. Market makers may be short calls, creating upside fuel.
- Max Pain @ $14.0 — Spot is 18.9% above Max Pain. Gravitational pull may increase as expiry approaches.
- Support $13.0 / Resistance $18.0 — Put Wall at $13.0 acts as support. Call Wall at $18.0 acts as resistance. Net gamma concentration creates dealer hedging flows at these levels.
- Expected Move (Straddle-mid): ±29.82% ($5.15) — ATM straddle-mid implies a ±29.82% move by expiry. Range: $12.12 — $22.42
Largest SMMT Open Interest Strikes
Calls: $18 (4,023), $14 (3,501), $15 (3,433), $20 (748), $17 (675). Puts: $13 (895), $11 (602), $9 (543), $12 (438), $14 (388).
Later SMMT expirations: 2026-10-23, 2026-10-30, 2027-01-15, 2027-03-19, 2027-04-16, 2028-01-21.
Max pain is the strike at which option holders lose the most at expiration. Gamma exposure (GEX) estimates how much options dealers must hedge as the stock moves: positive gamma tends to dampen moves, negative gamma amplifies them, and the gamma flip is the price where net GEX changes sign. Call and put walls are the strikes where call and put gamma exposure is most concentrated, often read as resistance and support. Methodology
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