Tandem Diabetes Care (TNDM) Options Chain
NASDAQ: TNDMHealth CareMedical/Dental InstrumentsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 39
- Share price
- $16.11
- Put/call ratio (OI)
- 26.00
- Put/call ratio (volume)
- 1.76
- Expected move
- ±$0.0411
- Open interest (C / P)
- 1 / 26
TNDM options summary
The TNDM options chain for the November 20, 2026 expiration lists 27 call and 18 put contracts, with 39 days until expiration. Open interest stands at 1 calls and 26 puts, a put/call ratio of 26.00, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $16.00 strike is 0.8%, which implies the market expects a move of about ±$0.0411 (0.3%) in Tandem Diabetes Care stock by expiration.
The most open interest sits at the $29.00 call (1 contracts) and the $9.00 put (10 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
TNDM options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 7.00 | 0.00 | 0.15 | 0.20 | |||||
| — | — | — | 8.00 | 0.00 | 0.00 | 0.36 | |||||
| — | — | — | 9.00 | 0.00 | 0.75 | 0.27 | |||||
| — | — | — | 10.00 | 0.00 | 0.75 | 0.50 | |||||
| 6.50 | 10.40 | 13.00 | 11.00 | 0.00 | 0.80 | 0.80 | |||||
| 3.90 | 0.00 | 0.00 | 12.00 | 0.00 | 0.00 | 0.65 | |||||
| 4.19 | 0.00 | 0.00 | 13.00 | 0.00 | 0.00 | 0.61 | |||||
| 2.70 | 0.00 | 0.00 | 14.00 | 0.00 | 0.00 | 0.91 | |||||
| 2.00 | 0.00 | 0.00 | 15.00 | 0.00 | 0.00 | 1.30 | |||||
| 2.35 | 0.00 | 0.00 | 16.00 | 0.00 | 0.00 | 1.95 | |||||
| 1.40 | 0.00 | 0.00 | 17.00 | 0.00 | 0.00 | 2.55 | |||||
| 1.40 | 0.00 | 0.00 | 18.00 | 0.00 | 0.00 | 1.70 | |||||
| 0.80 | 0.00 | 0.00 | 19.00 | 0.00 | 0.00 | 2.15 | |||||
| 0.78 | 0.00 | 0.00 | 20.00 | 0.00 | 0.00 | 2.55 | |||||
| 1.15 | 0.00 | 0.00 | 21.00 | 4.90 | 6.10 | 5.53 | |||||
| 0.50 | 0.00 | 0.00 | 22.00 | 0.00 | 0.00 | 6.50 | |||||
| 0.50 | 0.00 | 0.00 | 23.00 | 0.00 | 0.00 | 3.30 | |||||
| 2.55 | 0.00 | 0.00 | 24.00 | — | — | — | |||||
| 2.82 | 0.00 | 0.00 | 25.00 | — | — | — | |||||
| 0.25 | 0.00 | 0.00 | 26.00 | — | — | — | |||||
| 0.23 | 0.00 | 0.00 | 27.00 | — | — | — | |||||
| 1.17 | 0.00 | 0.00 | 28.00 | — | — | — | |||||
| 1.05 | 0.00 | 1.30 | 29.00 | 0.00 | 0.00 | 7.40 | |||||
| 0.15 | 0.00 | 0.00 | 30.00 | — | — | — | |||||
| 0.85 | 0.00 | 0.00 | 31.00 | — | — | — | |||||
| 0.80 | 0.00 | 0.00 | 32.00 | — | — | — | |||||
| 0.50 | 0.00 | 0.00 | 33.00 | — | — | — | |||||
| 0.77 | 0.00 | 0.00 | 34.00 | — | — | — | |||||
| 0.15 | 0.00 | 0.00 | 35.00 | — | — | — | |||||
| 0.62 | 0.00 | 0.00 | 36.00 | — | — | — | |||||
| 0.55 | 0.00 | 0.00 | 37.00 | — | — | — | |||||
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 TNDM put/call ratio?
For the November 20, 2026 expiration, the TNDM put/call ratio based on open interest is 26.00 (26 puts vs 1 calls), and 1.76 based on today's volume. A ratio above 1 means more puts than calls.
What is TNDM's implied volatility?
At-the-money implied volatility for TNDM options expiring November 20, 2026 is about 0.8%, an annualized estimate of how much the market expects Tandem Diabetes Care stock to move.
How many TNDM option expiration dates are there?
TNDM has 5 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.