Tectonic Therapeutic (TECX) Options Chain

NASDAQ: TECXHealth CareBiotechnology: Biological Products (No Diagnostic Substances)USD

23.33+0.58 (+2.55%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $23.33
Put/call ratio (OI): 0.99
Put/call ratio (volume): 0.49
ATM implied volatility: 181.7%
Expected move: ±$18.30
Open interest (C / P): 1.42K / 1.40K

TECX options summary

The TECX options chain for the December 18, 2026 expiration lists 10 call and 11 put contracts, with 68 days until expiration. Open interest stands at 1,419 calls and 1,402 puts, a put/call ratio of 0.99, which is fairly balanced between calls and puts. At-the-money implied volatility near the $22.50 strike is 181.7%, which implies the market expects a move of about ±$18.30 (78.4%) in Tectonic Therapeutic stock by expiration.

The most open interest sits at the $30.00 call (1.32K contracts) and the $25.00 put (1.02K contracts).

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

TECX options chain · December 18, 2026

TECX 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
—	—	—	—	—	—	5.00	0.00	0.30	0.14	204.3%	1	38
0	5	—	21.48	0.00	0.00	10.00	0.00	4.90	0.55	282.2%	—	1
—	—	—	—	—	—	12.50	0.00	4.90	0.95	223.5%	1	2
0	1	—	17.00	0.00	0.00	15.00	0.10	4.90	1.55	179.5%	1	4
—	—	—	—	—	—	17.50	0.00	4.90	0.95	139.0%	1	7
3	—	242.3%	8.49	8.00	12.90	20.00	0.10	4.90	1.70	106.1%	1	18
1	—	360.3%	10.50	11.00	15.80	22.50	0.00	0.00	2.20	3.1%	1	0
TECX $23.33
0	20	3.1%	15.30	0.00	0.00	25.00	2.80	5.80	4.00	81.6%	1	1,022
1,324	599	84.2%	1.25	0.00	2.80	30.00	6.40	10.50	8.41	94.6%	300	300
69	1	94.9%	2.73	0.00	2.00	35.00	10.20	14.50	8.80	83.5%	1	6
11	1	156.5%	2.23	0.00	4.90	40.00	10.60	15.30	16.60	—	—	4
0	1	25.0%	6.30	0.00	0.00	45.00	—	—	—	—	—	—
11	7	246.9%	4.00	2.50	7.00	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 TECX put/call ratio?

For the December 18, 2026 expiration, the TECX put/call ratio based on open interest is 0.99 (1,402 puts vs 1,419 calls), and 0.49 based on today's volume. A ratio above 1 means more puts than calls.

What is TECX's implied volatility?

At-the-money implied volatility for TECX options expiring December 18, 2026 is about 181.7%, an annualized estimate of how much the market expects Tectonic Therapeutic stock to move.

How many TECX option expiration dates are there?

TECX has 6 listed expiration dates, from Oct 16, 2026 to Apr 16, 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.