908 Devices (MASS) Options Chain
NASDAQ: MASSIndustrialsIndustrial Machinery/ComponentsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $12.05
- Put/call ratio (OI)
- 3.85
- Put/call ratio (volume)
- 0.05
- Expected move
- ±$2.67
- Open interest (C / P)
- 197 / 759
MASS options summary
The MASS options chain for the November 20, 2026 expiration lists 6 call and 5 put contracts, with 40 days until expiration. Open interest stands at 197 calls and 759 puts, a put/call ratio of 3.85, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $12.50 strike is 67.0%, which implies the market expects a move of about ±$2.67 (22.2%) in 908 Devices stock by expiration.
The most open interest sits at the $12.50 call (144 contracts) and the $12.50 put (609 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
MASS options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 5.09 | 5.60 | 8.40 | 5.00 | 0.00 | 0.00 | 0.40 | |||||
| 4.30 | 3.10 | 5.90 | 7.50 | 0.00 | 0.00 | 0.45 | |||||
| 3.00 | 1.05 | 3.90 | 10.00 | 0.00 | 2.05 | 0.71 | |||||
| 1.65 | 0.20 | 1.85 | 12.50 | 0.20 | 2.20 | 1.32 | |||||
| 0.60 | 0.00 | 0.95 | 15.00 | 2.05 | 4.20 | 2.71 | |||||
| 0.37 | 0.00 | 0.00 | 17.50 | — | — | — | |||||
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 MASS put/call ratio?
For the November 20, 2026 expiration, the MASS put/call ratio based on open interest is 3.85 (759 puts vs 197 calls), and 0.05 based on today's volume. A ratio above 1 means more puts than calls.
What is MASS's implied volatility?
At-the-money implied volatility for MASS options expiring November 20, 2026 is about 67.0%, an annualized estimate of how much the market expects 908 Devices stock to move.
How many MASS option expiration dates are there?
MASS 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.