Definium Therapeutics (DFTX) Options Chain

NASDAQ: DFTXHealthcareBiotechnologyUSD

36.90+2.72 (+7.96%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $36.90
Put/call ratio (OI): 0.27
Put/call ratio (volume): 0.23
ATM implied volatility: 56.3%
Expected move: ±$6.87
Open interest (C / P): 768 / 211

DFTX options summary

The DFTX options chain for the November 20, 2026 expiration lists 16 call and 13 put contracts, with 40 days until expiration. Open interest stands at 768 calls and 211 puts, a put/call ratio of 0.27, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $37.00 strike is 56.3%, which implies the market expects a move of about ±$6.87 (18.6%) in Definium Therapeutics stock by expiration.

The most open interest sits at the $50.00 call (147 contracts) and the $35.00 put (58 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

DFTX options chain · November 20, 2026

DFTX calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
1	—	99.4%	13.85	10.50	14.50	25.00	—	—	—	—	—	—
5	2	77.3%	6.18	7.00	10.40	29.00	0.00	1.25	0.45	70.8%	—	4
81	21	71.4%	5.40	6.10	9.40	30.00	—	—	—	—	—	—
—	—	—	—	—	—	31.00	0.05	1.70	0.98	64.8%	8	15
—	—	—	—	—	—	32.00	0.30	1.95	1.21	64.3%	8	2
—	—	—	—	—	—	33.00	0.50	1.55	2.35	53.8%	1	6
1	1	63.0%	6.65	3.10	6.20	34.00	0.80	4.90	2.96	87.7%	1	23
9	3	62.1%	2.32	2.55	5.50	35.00	1.70	2.10	2.16	57.2%	19	58
32	10	68.5%	3.40	3.10	4.50	36.00	1.60	3.20	2.60	58.1%	1	21
DFTX $36.90
—	—	—	—	—	—	37.00	2.15	3.50	3.00	56.3%	10	28
10	3	64.5%	3.00	1.80	3.60	38.00	2.65	5.50	3.30	70.0%	19	19
38	1	61.5%	2.60	1.40	2.95	39.00	3.20	6.00	5.21	68.1%	5	2
93	13	63.7%	2.25	1.60	2.30	40.00	3.90	5.50	4.82	56.3%	2	18
15	9	59.8%	1.71	1.00	1.95	41.00	—	—	—	—	—	—
45	3	66.5%	0.83	0.20	2.85	42.00	4.90	8.00	8.17	62.6%	1	5
118	6	58.6%	1.20	0.45	1.50	43.00	—	—	—	—	—	—
23	13	58.6%	1.03	0.50	1.10	44.00	6.80	9.50	7.25	65.3%	—	10
119	10	53.7%	0.70	0.05	0.95	45.00	—	—	—	—	—	—
31	25	68.6%	1.35	0.00	1.70	46.00	—	—	—	—	—	—
147	204	66.3%	0.24	0.00	0.75	50.00	—	—	—	—	—	—

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 DFTX put/call ratio?

For the November 20, 2026 expiration, the DFTX put/call ratio based on open interest is 0.27 (211 puts vs 768 calls), and 0.23 based on today's volume. A ratio above 1 means more puts than calls.

What is DFTX's implied volatility?

At-the-money implied volatility for DFTX options expiring November 20, 2026 is about 56.3%, an annualized estimate of how much the market expects Definium Therapeutics stock to move.

How many DFTX option expiration dates are there?

DFTX has 7 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.