Mereo BioPharma Group (MREO) Options Chain
NASDAQ: MREOHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $0.3499
- Put/call ratio (OI)
- 0.01
- Put/call ratio (volume)
- 0.12
- ATM implied volatility
- 168.8%
- Expected move
- ±$0.1955
- Open interest (C / P)
- 5.47K / 32
MREO options summary
The MREO options chain for the November 20, 2026 expiration lists 5 call and 2 put contracts, with 40 days until expiration. Open interest stands at 5,475 calls and 32 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $0.50 strike is 168.8%, which implies the market expects a move of about ±$0.1955 (55.9%) in Mereo BioPharma Group stock by expiration.
The most open interest sits at the $1.00 call (2.78K contracts) and the $1.00 put (30 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
MREO options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.05 | 0.00 | 0.10 | 0.50 | 0.00 | 0.35 | 0.17 | |||||
| 0.05 | 0.00 | 0.10 | 1.00 | 0.00 | 4.90 | 0.73 | |||||
| 0.05 | 0.00 | 4.00 | 1.50 | — | — | — | |||||
| 0.05 | 0.00 | 0.05 | 2.00 | — | — | — | |||||
| 0.05 | 0.00 | 4.00 | 3.00 | — | — | — | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the MREO put/call ratio?
For the November 20, 2026 expiration, the MREO put/call ratio based on open interest is 0.01 (32 puts vs 5,475 calls), and 0.12 based on today's volume. A ratio above 1 means more puts than calls.
What is MREO's implied volatility?
At-the-money implied volatility for MREO options expiring November 20, 2026 is about 168.8%, an annualized estimate of how much the market expects Mereo BioPharma Group stock to move.
How many MREO option expiration dates are there?
MREO has 6 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.