Amphastar Pharmaceuticals (AMPH) Options Chain
NASDAQ: AMPHHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 69
- Share price
- $26.62
- Put/call ratio (OI)
- 0.67
- Put/call ratio (volume)
- 0.45
- Expected move
- ±$6.09
- Open interest (C / P)
- 135 / 90
AMPH options summary
The AMPH options chain for the December 18, 2026 expiration lists 5 call and 4 put contracts, with 69 days until expiration. Open interest stands at 135 calls and 90 puts, a put/call ratio of 0.67, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $25.00 strike is 52.6%, which implies the market expects a move of about ±$6.09 (22.9%) in Amphastar Pharmaceuticals stock by expiration.
The most open interest sits at the $20.00 call (105 contracts) and the $17.50 put (67 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
AMPH options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 14.10 | 0.00 | 0.00 | 5.00 | — | — | — | |||||
| — | — | — | 12.50 | 0.00 | 0.00 | 0.30 | |||||
| — | — | — | 15.00 | 0.00 | 0.00 | 0.65 | |||||
| — | — | — | 17.50 | 0.00 | 0.50 | 0.20 | |||||
| 7.72 | 4.90 | 7.30 | 20.00 | 0.00 | 1.00 | 0.70 | |||||
| 2.00 | 0.00 | 0.00 | 22.50 | — | — | — | |||||
| 2.55 | 1.20 | 5.30 | 25.00 | — | — | — | |||||
| 0.70 | 0.00 | 2.55 | 30.00 | — | — | — | |||||
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 AMPH put/call ratio?
For the December 18, 2026 expiration, the AMPH put/call ratio based on open interest is 0.67 (90 puts vs 135 calls), and 0.45 based on today's volume. A ratio above 1 means more puts than calls.
What is AMPH's implied volatility?
At-the-money implied volatility for AMPH options expiring December 18, 2026 is about 52.6%, an annualized estimate of how much the market expects Amphastar Pharmaceuticals stock to move.
How many AMPH option expiration dates are there?
AMPH has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 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.