Merck Sees Heavy Bearish Options Activity as $1.67M in Unusual Contracts Flood the Tape
By TrendSpider Editor
Unusual options activity in Merck & Company, Inc. skewed heavily to the downside on Wednesday, May 20, 2026, with five flagged contracts generating a total premium of $1,678,861.60, the vast majority tied to put positions. MRK shares slipped 0.74% to $113.42 on the session, sitting in the upper
Merck Sees Heavy Bearish Options Activity as $1.67M in Unusual Contracts Flood the Tape
Unusual options activity in Merck & Company, Inc. skewed heavily to the downside on Wednesday, May 20, 2026, with five flagged contracts generating a total premium of $1,678,861.60, the vast majority tied to put positions. MRK shares slipped 0.74% to $113.42 on the session, sitting in the upper half of its 52-week range of $75.40 to $125.14, but the options market suggests traders are hedging or betting on further downside from current levels. The concentration of put volume across multiple expiration dates and strike prices points to a deliberate, multi-leg bearish posture rather than a single opportunistic trade.
Key Drivers of the MRK Stock Move
- Main Catalyst: Five unusual options contracts were flagged on MRK today, with four puts and one call. The largest single contract was a PUT at the $110 strike expiring June 17, 2027, with a size of 1,000 contracts and a premium of $1,115,000, representing the dominant share of today's total unusual premium. The sole call was a $130 strike expiring August 21, 2026, with a size of 183 contracts and a premium of $35,685.
- Bull Case: The lone call contract targeting the $130 strike by August 21, 2026 implies a roughly 14.6% upside from the current price of $113.42. MRK is already trading well above its 52-week low of $75.40, and the stock's proximity to its 52-week high of $125.14 suggests underlying momentum that some traders may be positioning to capture.
- Bear Case: Put premium overwhelmingly dominated today's flow. The $110 put expiring June 17, 2027 alone carried $1,115,000 in premium at 108% of open interest, signaling a high-conviction directional bet. The $109 put expiring June 18, 2026 printed at a striking 3,189% of open interest, indicating the market had almost no existing positioning at that strike before today's trade hit the tape.
The forward setup for MRK is clouded by a combination of stock-specific and macro pressures. The put activity spans multiple expirations ranging from near-term June 2026 all the way out to January 2027, suggesting that bearish conviction is not limited to a short-term event catalyst but extends across a broader time horizon. With MRK trading at $113.42 and put strikes clustered between $100 and $110, traders are effectively pricing in a potential pullback of 3% to 12% from current levels. The $100 strike put expiring January 15, 2027 is particularly notable as a longer-dated, deep out-of-the-money hedge that could reflect concern about pipeline risks, pricing pressures, or broader pharmaceutical sector headwinds playing out over the next several quarters.
MRK Unusual Options Activity
- PUT | Strike: $109 | Expiry: June 18, 2026 | Size: 287 | Open Interest: 3,189% | OTM | Premium: $61,418
- PUT | Strike: $100 | Expiry: January 15, 2027 | Size: 539 | Open Interest: 17% | OTM | Premium: $277,585
- PUT | Strike: $110 | Expiry: June 17, 2027 | Size: 1,000 | Open Interest: 108% | OTM | Premium: $1,115,000
- CALL | Strike: $130 | Expiry: August 21, 2026 | Size: 183 | Open Interest: 310% | OTM | Premium: $35,685
- PUT | Strike: $110 | Expiry: July 17, 2026 | Size: 518 | Open Interest: 21% | OTM | Premium: $189,173.60
Total unusual premium across all five contracts was $1,678,861.60. Put contracts accounted for four of the five flagged trades and represented the overwhelming share of total premium. The $109 strike put expiring in less than a month printed at 3,189% of open interest, the most extreme relative-to-OI reading of the session, pointing to a fresh and aggressive position being established at that strike with minimal prior market interest.
MRK Seasonality
May and June have historically represented a transitional period for large-cap pharmaceutical names, where post-earnings repositioning and mid-year portfolio rebalancing can amplify options volume. The clustering of near-term put expirations in June 2026 aligns with a period when seasonal volatility in the sector tends to pick up ahead of major medical conferences and mid-year guidance updates.
MRK Relative Performance
MRK shed 0.74% on the session to close at $113.42, a modest underperformance on a day when broader market sentiment was mixed. The stock remains well above its 52-week low of $75.40, reflecting a strong recovery over the past year, but it has yet to reclaim its 52-week high of $125.14. The gap between the current price and that high of roughly $11.72 per share is a range that today's bearish options flow suggests some market participants believe may not close in the near term.