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
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $0.3499
- Put/call ratio (OI)
- 0.12
- Put/call ratio (volume)
- 0.01
- ATM implied volatility
- 337.5%
- Expected move
- ±$0.1635
- Open interest (C / P)
- 823 / 102
MREO options summary
The MREO options chain for the October 16, 2026 expiration lists 3 call and 4 put contracts, with 7 days until expiration. Open interest stands at 823 calls and 102 puts, a put/call ratio of 0.12, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $0.50 strike is 337.5%, which implies the market expects a move of about ±$0.1635 (46.7%) in Mereo BioPharma Group stock by expiration.
The most open interest sits at the $0.50 call (801 contracts) and the $2.00 put (45 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
MREO options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 0.03 | 0.00 | 0.05 | 0.50 | 0.00 | 1.00 | 0.35 | |||||
| 0.01 | 0.00 | 0.05 | 1.00 | 0.00 | 1.30 | 0.60 | |||||
| — | — | — | 2.00 | 1.50 | 2.00 | 1.60 | |||||
| 0.05 | 0.00 | 3.80 | 3.00 | 0.25 | 3.20 | 2.70 | |||||
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 October 16, 2026 expiration, the MREO put/call ratio based on open interest is 0.12 (102 puts vs 823 calls), and 0.01 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 October 16, 2026 is about 337.5%, 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.