Verastem (VSTM) Options Chain
NASDAQ: VSTMHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $8.38
- Put/call ratio (OI)
- 0.66
- Put/call ratio (volume)
- 1.91
- ATM implied volatility
- 167.2%
- Expected move
- ±$6.05
- Open interest (C / P)
- 1.56K / 1.02K
VSTM options summary
The VSTM options chain for the December 18, 2026 expiration lists 13 call and 7 put contracts, with 68 days until expiration. Open interest stands at 1,559 calls and 1,024 puts, a put/call ratio of 0.66, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $8.00 strike is 167.2%, which implies the market expects a move of about ±$6.05 (72.2%) in Verastem stock by expiration.
The most open interest sits at the $5.00 call (722 contracts) and the $5.00 put (773 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
VSTM options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 6.40 | 0.00 | 0.00 | 1.00 | — | — | — | |||||
| 2.85 | 2.60 | 7.50 | 2.00 | 0.00 | 4.90 | 0.15 | |||||
| 4.35 | 3.00 | 7.60 | 3.00 | 0.00 | 4.90 | 0.65 | |||||
| 4.50 | 3.30 | 5.50 | 4.00 | 0.00 | 4.90 | 0.45 | |||||
| 3.07 | 1.50 | 6.00 | 5.00 | 0.10 | 1.00 | 0.50 | |||||
| 3.10 | 1.00 | 5.50 | 6.00 | 0.30 | 5.00 | 0.95 | |||||
| 2.70 | 0.10 | 3.00 | 7.00 | 0.00 | 4.90 | 2.00 | |||||
| 2.05 | 0.30 | 4.00 | 8.00 | 0.10 | 4.90 | 2.70 | |||||
| 2.20 | 0.00 | 4.90 | 9.00 | — | — | — | |||||
| 2.15 | 0.45 | 2.25 | 10.00 | — | — | — | |||||
| 1.25 | 0.00 | 0.00 | 11.00 | — | — | — | |||||
| 1.10 | 0.70 | 5.00 | 12.00 | — | — | — | |||||
| 1.05 | 0.00 | 4.90 | 13.00 | — | — | — | |||||
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 VSTM put/call ratio?
For the December 18, 2026 expiration, the VSTM put/call ratio based on open interest is 0.66 (1,024 puts vs 1,559 calls), and 1.91 based on today's volume. A ratio above 1 means more puts than calls.
What is VSTM's implied volatility?
At-the-money implied volatility for VSTM options expiring December 18, 2026 is about 167.2%, an annualized estimate of how much the market expects Verastem stock to move.
How many VSTM option expiration dates are there?
VSTM 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.