Merck & Co., Inc. (MRK) Most Active Options
The 23 most actively traded Merck & Co., Inc. (MRK) option contracts at the latest daily snapshot, ranked by volume. Each row shows the contract's price, implied volatility, delta, open interest, and how today's volume compares with its own 30-day average — click a contract to analyze it in the OptiView platform.
Data as of Oct 9, 2026, 3:55 PM ET · OPRA data 15 minutes delayed · For information only — not investment advice.
Most Active MRK Contracts
| Contract | Expiration | DTE | Last | IV | IV rank (30d) | Delta | Open interest | Volume | vs 30d avg |
|---|---|---|---|---|---|---|---|---|---|
| MRK $140 put | Nov 20, 2026 | 42d | $3.89 | 34.4% | 80 | -0.33 | 3,397 | 1,526 | 31.7× avg |
| MRK $160 call | Nov 20, 2026 | 42d | $2.17 | 33.7% | 46 | 0.24 | 4,499 | 1,258 | 13.1× avg |
| MRK $155 call | Nov 6, 2026 | 28d | $2.76 | 36.8% | 40 | 0.30 | 8 | 809 | 6.4× avg |
| MRK $147 call | Oct 16, 2026 | 7d | $1.55 | 22.5% | 4 | 0.44 | 33 | 518 | 1.1× avg |
| MRK $150 call | Oct 16, 2026 | 7d | $0.63 | 25.4% | 33 | 0.24 | 7,503 | 467 | 1.0× avg |
| MRK $145 call | Oct 16, 2026 | 7d | $2.62 | 21.9% | 53 | 0.62 | 5,398 | 436 | 1.9× avg |
| MRK $150 call | Nov 20, 2026 | 42d | $5.10 | 34.0% | 61 | 0.44 | 5,915 | 395 | 4.6× avg |
| MRK $155 call | Oct 16, 2026 | 7d | $0.15 | 29.7% | 11 | 0.08 | 6,457 | 370 | 2.1× avg |
| MRK $134 call | Oct 16, 2026 | 7d | $9.55 | 0.0% | 0 | 1.00 | 2 | 358 | 0.5× avg |
| MRK $165 call | Nov 20, 2026 | 42d | $1.40 | 33.8% | 47 | 0.16 | 2,518 | 338 | 3.5× avg |
| MRK $142 call | Oct 16, 2026 | 7d | $5.02 | 22.3% | 54 | 0.83 | 52 | 295 | 1.3× avg |
| MRK $146 call | Oct 16, 2026 | 7d | $1.92 | 23.0% | 56 | 0.53 | 62 | 285 | 1.2× avg |
| MRK $140 call | Oct 16, 2026 | 7d | $6.00 | 0.0% | 0 | 1.00 | 1,822 | 283 | 1.2× avg |
| MRK $142 put | Oct 16, 2026 | 7d | $0.70 | 28.7% | 37 | -0.22 | 77 | 261 | 3.2× avg |
| MRK $140 put | Oct 16, 2026 | 7d | $0.42 | 28.1% | 34 | -0.13 | 1,797 | 228 | 2.8× avg |
| MRK $160 call | Dec 18, 2026 | 70d | $3.41 | 31.2% | 33 | 0.28 | 1,665 | 207 | 2.2× avg |
| MRK $140 call | Oct 30, 2026 | 21d | $9.30 | 39.0% | 83 | 0.70 | 1,548 | 200 | 20.6× avg |
| MRK $144 put | Oct 16, 2026 | 7d | $1.40 | 29.3% | 40 | -0.34 | 82 | 184 | 2.3× avg |
| MRK $144 call | Oct 16, 2026 | 7d | $3.52 | 20.4% | 50 | 0.71 | 243 | 184 | 0.8× avg |
| MRK $162.5 call | Oct 16, 2026 | 7d | $0.03 | 35.7% | 24 | 0.02 | 482 | 180 | 1.0× avg |
| MRK $155 call | Dec 18, 2026 | 70d | $4.79 | 31.8% | 36 | 0.37 | 3,276 | 179 | 1.9× avg |
| MRK $149 call | Oct 16, 2026 | 7d | $1.05 | 24.3% | 22 | 0.30 | 368 | 178 | 0.4× avg |
| MRK $143 put | Oct 16, 2026 | 7d | $1.00 | 28.3% | 35 | -0.28 | 268 | 175 | 2.2× avg |
Ranked by volume at the latest daily snapshot. "vs 30d avg" compares today's volume with the contract's own 30-day average.
The most active MRK contract today is the $140 put expiring in 42 days, with 1,526 contracts traded. Calls dominate the most-active list (18 of the top 23), showing where trading interest concentrates. 3 of these contracts are running well ahead of the usual daily volume.
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MRK Options FAQ
Which MRK option contract is most active today?
The most traded MRK contract is the $140 put expiring Nov 20, 2026, with 1,526 contracts traded as of Oct 9, 2026.
How does OptiView rank the most active MRK options?
The table lists the 23 MRK contracts with the highest volume at the latest daily snapshot, alongside price, implied volatility, delta, open interest, and each contract's volume versus its own 30-day average.
Methodology. IV rank compares the current 30-day at-the-money implied volatility with its highest and lowest values over the past 52 weeks. Max pain is the strike that minimizes the total payout to option holders at expiration. The call and put walls are the strikes carrying the largest call and put open interest across all expirations. Net gamma exposure (GEX) is measured from the dealer perspective. All statistics are derived from delayed OPRA options data.
Options trading involves significant risk, and losses can exceed your initial investment. Always consult a licensed financial professional before making investment decisions. OptiView does not provide financial advice; all figures on this page are descriptive statistics, not recommendations.