Amphastar Pharmaceuticals (AMPH) Options Chain
NASDAQ: AMPHHealth 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
- $26.62
- Put/call ratio (OI)
- 0.09
- Put/call ratio (volume)
- 0.00
- Expected move
- ±$8.01
- Open interest (C / P)
- 32 / 3
AMPH options summary
The AMPH options chain for the November 20, 2026 expiration lists 3 call and 1 put contracts, with 40 days until expiration. Open interest stands at 32 calls and 3 puts, a put/call ratio of 0.09, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $25.00 strike is 90.9%, which implies the market expects a move of about ±$8.01 (30.1%) in Amphastar Pharmaceuticals stock by expiration.
The most open interest sits at the $25.00 call (15 contracts) and the $22.50 put (3 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
AMPH options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 22.50 | 0.00 | 3.70 | 1.20 | |||||
| 2.59 | 1.05 | 4.00 | 25.00 | — | — | — | |||||
| 1.00 | 0.45 | 2.00 | 30.00 | — | — | — | |||||
| 0.38 | 0.00 | 3.50 | 35.00 | — | — | — | |||||
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 November 20, 2026 expiration, the AMPH put/call ratio based on open interest is 0.09 (3 puts vs 32 calls), and 0.00 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 November 20, 2026 is about 90.9%, 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.