Syndax Pharmaceuticals (SNDX) Options Chain

NASDAQ: SNDXHealth CareBiotechnology: Pharmaceutical PreparationsUSD

16.90-0.13 (-0.76%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

After hours: 16.85 -0.30%

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $16.90
Put/call ratio (OI): 0.11
Put/call ratio (volume): 0.50
ATM implied volatility: 74.1%
Expected move: ±$1.85
Open interest (C / P): 5.90K / 677

SNDX options summary

The SNDX options chain for the October 16, 2026 expiration lists 18 call and 13 put contracts, with 8 days until expiration. Open interest stands at 5,900 calls and 677 puts, a put/call ratio of 0.11, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $17.00 strike is 74.1%, which implies the market expects a move of about ±$1.85 (11.0%) in Syndax Pharmaceuticals stock by expiration.

The most open interest sits at the $25.00 call (3.07K contracts) and the $17.00 put (178 contracts).

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

SNDX options chain · October 16, 2026

SNDX 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	1	1059.8%	9.30	10.00	13.50	10.00	—	—	—	—	—	—
—	—	—	—	—	—	11.00	0.00	2.65	0.50	415.6%	—	1
—	—	—	—	—	—	12.00	0.00	1.75	0.25	296.1%	—	126
0	—	—	12.30	0.00	0.00	13.00	—	—	—	—	—	—
0	20	103.7%	3.40	0.50	4.00	15.00	0.25	0.40	0.30	100.4%	201	116
—	—	—	—	—	—	16.00	0.50	0.85	0.70	103.5%	4	27
SNDX $16.90
33	2	70.5%	1.20	0.00	1.40	17.00	0.60	1.15	1.35	77.7%	11	178
30	2	104.7%	0.55	0.50	0.85	18.00	0.25	2.30	1.01	51.4%	5	49
119	5	114.7%	0.50	0.25	0.75	19.00	1.55	3.60	2.55	111.9%	1	46
286	30	138.3%	0.40	0.25	0.75	20.00	1.85	5.20	2.22	129.3%	27	35
1,666	526	153.1%	0.35	0.15	0.75	21.00	2.80	6.20	2.05	146.5%	2	43
515	10	247.7%	0.25	0.00	2.20	22.00	3.70	7.10	3.80	150.4%	3	15
116	10	269.9%	0.20	0.00	2.25	23.00	4.60	8.00	5.65	148.8%	30	25
5	1	282.4%	0.18	0.00	2.15	24.00	1.85	5.90	7.50	—	1	1
3,066	3	176.2%	0.20	0.05	0.35	25.00	6.60	10.00	7.77	176.2%	26	15
1	1	251.9%	3.27	0.00	1.15	26.00	—	—	—	—	—	—
9	3	329.3%	0.45	0.00	2.15	27.00	—	—	—	—	—	—
2	—	357.6%	1.59	0.00	2.40	28.00	—	—	—	—	—	—
1	—	356.3%	0.05	0.00	2.15	29.00	—	—	—	—	—	—
50	1	368.8%	0.05	0.00	2.15	30.00	—	—	—	—	—	—
0	10	50.0%	0.14	0.00	0.00	40.00	—	—	—	—	—	—

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 SNDX put/call ratio?

For the October 16, 2026 expiration, the SNDX put/call ratio based on open interest is 0.11 (677 puts vs 5,900 calls), and 0.50 based on today's volume. A ratio above 1 means more puts than calls.

What is SNDX's implied volatility?

At-the-money implied volatility for SNDX options expiring October 16, 2026 is about 74.1%, an annualized estimate of how much the market expects Syndax Pharmaceuticals stock to move.

How many SNDX option expiration dates are there?

SNDX has 5 listed expiration dates, from Oct 16, 2026 to Jan 21, 2028.

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.