Entera Bio (ENTX) Options Chain
NASDAQ: ENTXHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $2.66
- Put/call ratio (OI)
- 0.12
- Put/call ratio (volume)
- 1.33
- ATM implied volatility
- 109.8%
- Expected move
- ±$0.9666
- Open interest (C / P)
- 380 / 44
ENTX options summary
The ENTX options chain for the November 20, 2026 expiration lists 6 call and 3 put contracts, with 40 days until expiration. Open interest stands at 380 calls and 44 puts, a put/call ratio of 0.12, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $3.00 strike is 109.8%, which implies the market expects a move of about ±$0.9666 (36.3%) in Entera Bio stock by expiration.
The most open interest sits at the $3.00 call (207 contracts) and the $3.00 put (42 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
ENTX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 2.05 | 0.10 | 4.10 | 1.00 | — | — | — | |||||
| 2.01 | 0.00 | 3.90 | 2.00 | 0.00 | 1.90 | 0.01 | |||||
| 0.38 | 0.30 | 0.55 | 3.00 | 0.00 | 0.90 | 0.60 | |||||
| 0.13 | 0.00 | 0.40 | 4.00 | 0.00 | 4.00 | 1.20 | |||||
| 0.20 | 0.00 | 2.60 | 5.00 | — | — | — | |||||
| 0.45 | 0.00 | 2.60 | 7.00 | — | — | — | |||||
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 ENTX put/call ratio?
For the November 20, 2026 expiration, the ENTX put/call ratio based on open interest is 0.12 (44 puts vs 380 calls), and 1.33 based on today's volume. A ratio above 1 means more puts than calls.
What is ENTX's implied volatility?
At-the-money implied volatility for ENTX options expiring November 20, 2026 is about 109.8%, an annualized estimate of how much the market expects Entera Bio stock to move.
How many ENTX option expiration dates are there?
ENTX has 4 listed expiration dates, from Oct 16, 2026 to May 21, 2027.
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.