Eton Pharmaceuticals (ETON) Options Chain

NASDAQ: ETONHealth CareBiotechnology: Pharmaceutical PreparationsUSD

55.21+0.46 (+0.84%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $55.21
Put/call ratio (OI): 0.47
Put/call ratio (volume): 6.82
ATM implied volatility: 74.8%
Expected move: ±$13.68
Open interest (C / P): 1.91K / 895

ETON options summary

The ETON options chain for the November 20, 2026 expiration lists 19 call and 13 put contracts, with 40 days until expiration. Open interest stands at 1,913 calls and 895 puts, a put/call ratio of 0.47, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $55.00 strike is 74.8%, which implies the market expects a move of about ±$13.68 (24.8%) in Eton Pharmaceuticals stock by expiration.

The most open interest sits at the $55.00 call (621 contracts) and the $45.00 put (414 contracts).

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

ETON options chain · November 20, 2026

ETON 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
4	4	—	29.25	34.00	38.10	2.50	—	—	—	—	—	—
0	—	—	23.59	0.00	0.00	5.00	—	—	—	—	—	—
5	5	888.1%	26.04	49.90	53.90	12.50	—	—	—	—	—	—
2	2	—	16.05	13.90	18.10	15.00	0.00	2.40	0.12	298.8%	2	51
0	3	—	39.94	0.00	0.00	17.50	0.00	3.20	2.25	288.7%	1	2
6	2	166.0%	43.15	33.30	37.60	20.00	0.00	2.25	0.57	233.3%	1	1
0	5	—	39.80	0.00	0.00	22.50	0.00	0.00	0.13	50.0%	11	0
46	20	—	11.00	18.20	22.20	25.00	0.00	0.00	4.00	50.0%	16	0
69	1	124.8%	25.23	24.90	26.60	30.00	0.00	0.00	0.50	50.0%	9	0
121	4	95.7%	21.00	18.70	22.70	35.00	0.00	2.55	1.15	125.0%	2	211
13	5	84.5%	16.92	14.00	18.10	40.00	0.00	2.70	1.70	98.7%	502	153
42	1	72.4%	10.80	9.50	13.60	45.00	0.00	3.20	3.70	77.8%	4	414
608	1	72.4%	6.80	6.10	10.10	50.00	0.75	4.30	3.30	66.7%	3	24
621	4	78.9%	5.00	3.80	8.00	55.00	3.40	6.80	4.80	70.8%	1	17
ETON $55.21
289	14	78.8%	3.52	2.20	5.70	60.00	6.50	9.70	11.45	69.9%	21	15
26	1	69.8%	2.26	0.20	3.80	65.00	9.80	13.40	16.12	66.7%	—	7
13	5	76.2%	1.84	0.00	3.00	70.00	—	—	—	—	—	—
38	2	87.3%	1.34	0.00	2.85	75.00	—	—	—	—	—	—
10	5	113.0%	0.30	0.00	2.45	90.00	—	—	—	—	—	—

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 ETON put/call ratio?

For the November 20, 2026 expiration, the ETON put/call ratio based on open interest is 0.47 (895 puts vs 1,913 calls), and 6.82 based on today's volume. A ratio above 1 means more puts than calls.

What is ETON's implied volatility?

At-the-money implied volatility for ETON options expiring November 20, 2026 is about 74.8%, an annualized estimate of how much the market expects Eton Pharmaceuticals stock to move.

How many ETON option expiration dates are there?

ETON 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.