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
- May 21, 2027
- Days to expiration
- 222
- Share price
- $16.11
- Put/call ratio (OI)
- 2.20
- Put/call ratio (volume)
- 0.35
- Expected move
- ±$10.06
- Open interest (C / P)
- 232 / 510
TNDM options summary
The TNDM options chain for the May 21, 2027 expiration lists 10 call and 6 put contracts, with 222 days until expiration. Open interest stands at 232 calls and 510 puts, a put/call ratio of 2.20, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $16.00 strike is 80.1%, which implies the market expects a move of about ±$10.06 (62.5%) in Tandem Diabetes Care stock by expiration.
The most open interest sits at the $30.00 call (178 contracts) and the $10.00 put (500 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
TNDM options chain · May 21, 2027
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 9.00 | 0.05 | 1.10 | 0.50 | |||||
| 6.81 | 4.90 | 8.50 | 10.00 | 0.60 | 1.15 | 0.81 | |||||
| — | — | — | 11.00 | 0.05 | 1.65 | 1.30 | |||||
| — | — | — | 12.00 | 0.05 | 3.00 | 1.75 | |||||
| — | — | — | 13.00 | 0.05 | 4.00 | 2.25 | |||||
| 4.80 | 2.50 | 6.00 | 14.00 | — | — | — | |||||
| 4.60 | 2.70 | 5.50 | 15.00 | 1.30 | 3.70 | 3.00 | |||||
| 4.00 | 3.00 | 5.00 | 16.00 | — | — | — | |||||
| 3.50 | 1.80 | 4.70 | 17.00 | — | — | — | |||||
| 3.50 | 1.50 | 4.40 | 18.00 | — | — | — | |||||
| 3.00 | 1.00 | 3.90 | 20.00 | — | — | — | |||||
| 1.50 | 0.60 | 3.60 | 22.00 | — | — | — | |||||
| 1.85 | 0.05 | 3.40 | 25.00 | — | — | — | |||||
| 0.60 | 0.25 | 1.60 | 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 TNDM put/call ratio?
For the May 21, 2027 expiration, the TNDM put/call ratio based on open interest is 2.20 (510 puts vs 232 calls), and 0.35 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 May 21, 2027 is about 80.1%, 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.