Altimmune (ALT) Options Chain

NASDAQ: ALTHealth CareBiotechnology: Pharmaceutical PreparationsUSD

2.61+0.01 (+0.38%)

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

Expiration date

Expiration: Jan 21, 2028
Days to expiration: 468
Share price: $2.61
Put/call ratio (OI): 0.01
Put/call ratio (volume): 0.09
ATM implied volatility: 126.0%
Expected move: ±$3.72
Open interest (C / P): 36.32K / 288

ALT options summary

The ALT options chain for the January 21, 2028 expiration lists 13 call and 11 put contracts, with 468 days until expiration. Open interest stands at 36,318 calls and 288 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 126.0%, which implies the market expects a move of about ±$3.72 (142.6%) in Altimmune stock by expiration.

The most open interest sits at the $3.00 call (19.15K contracts) and the $10.00 put (103 contracts).

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

ALT options chain · January 21, 2028

ALT 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
399	26	337.5%	2.20	0.60	4.50	0.50	0.00	0.00	0.04	50.0%	1	0
131	1	83.2%	2.59	0.85	2.60	1.00	0.05	0.30	0.15	97.7%	5	29
0	22	—	1.95	0.00	0.00	1.50	0.10	0.85	0.34	108.6%	6	9
222	1	178.3%	1.30	0.95	2.85	2.00	0.35	0.95	0.52	93.4%	1	12
643	232	156.3%	1.15	0.00	3.30	2.50	0.00	1.00	0.75	95.7%	10	11
ALT $2.61
19,148	3	96.1%	1.00	0.90	1.05	3.00	0.60	2.45	1.09	111.3%	6	25
142	1	158.2%	2.08	0.55	2.45	3.50	—	—	—	—	—	—
1,569	34	116.6%	1.25	0.05	1.95	4.00	0.20	5.00	1.46	136.1%	7	17
850	34	95.3%	1.25	0.50	0.85	4.50	0.00	5.00	2.23	89.8%	40	43
1,479	31	92.6%	0.70	0.45	0.70	5.00	0.00	0.00	3.24	—	15	0
408	23	99.7%	0.57	0.45	0.75	5.50	—	—	—	—	—	—
2,222	3	102.9%	0.49	0.40	0.60	7.00	3.40	6.40	4.39	103.9%	4	39
9,105	672	112.1%	0.37	0.30	0.55	10.00	6.70	9.90	7.50	154.1%	2	103

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 ALT put/call ratio?

For the January 21, 2028 expiration, the ALT put/call ratio based on open interest is 0.01 (288 puts vs 36,318 calls), and 0.09 based on today's volume. A ratio above 1 means more puts than calls.

What is ALT's implied volatility?

At-the-money implied volatility for ALT options expiring January 21, 2028 is about 126.0%, an annualized estimate of how much the market expects Altimmune stock to move.

How many ALT option expiration dates are there?

ALT has 11 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.