Rambus (RMBS) Options Chain

NASDAQ: RMBSTechnologySemiconductorsUSD

108.47-3.01 (-2.70%)

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

Expiration date

Expiration: Oct 16, 2026
Days to expiration: 8
Share price: $108.47
Put/call ratio (OI): 0.43
Put/call ratio (volume): 0.16
ATM implied volatility: 58.5%
Expected move: ±$9.40
Open interest (C / P): 9.11K / 3.88K

RMBS options summary

The RMBS options chain for the October 16, 2026 expiration lists 19 call and 18 put contracts, with 8 days until expiration. Open interest stands at 9,109 calls and 3,885 puts, a put/call ratio of 0.43, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $110.00 strike is 58.5%, which implies the market expects a move of about ±$9.40 (8.7%) in Rambus stock by expiration.

The most open interest sits at the $100.00 call (1.90K contracts) and the $70.00 put (1.76K contracts).

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

RMBS options chain · October 16, 2026

RMBS 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
10	—	390.5%	33.00	56.70	60.20	50.00	0.00	1.40	0.05	317.2%	10	99
—	—	—	—	—	—	55.00	0.00	1.40	0.01	282.6%	2	6
—	—	—	—	—	—	60.00	0.00	0.25	0.70	186.3%	1	222
8	1	135.9%	20.64	41.70	45.30	65.00	0.00	0.95	0.05	204.9%	1	205
18	1	143.0%	36.00	37.40	39.80	70.00	0.00	0.25	0.30	142.2%	1	1,763
3	1	100.8%	29.30	32.20	34.80	75.00	0.00	0.20	0.06	118.4%	12	138
68	4	119.0%	25.80	27.30	30.20	80.00	0.00	0.95	0.30	132.6%	2	253
342	4	142.2%	22.77	21.60	24.70	85.00	0.00	0.35	0.10	90.6%	4	199
464	5	117.2%	17.45	17.20	19.70	90.00	0.00	0.15	0.16	62.5%	4	193
351	9	55.1%	19.40	12.50	14.80	95.00	0.15	0.80	0.45	69.0%	8	468
1,895	13	76.4%	8.50	7.80	10.10	100.00	0.95	1.15	1.15	63.6%	9	123
1,263	5	55.4%	5.10	4.70	6.30	105.00	1.95	3.50	2.80	67.2%	9	98
RMBS $108.47
626	11	53.7%	2.70	1.90	3.60	110.00	3.70	6.10	6.00	63.4%	25	101
1,115	43	62.9%	1.45	1.30	2.05	115.00	6.60	9.50	7.05	60.0%	1	3
1,353	39	62.9%	0.90	0.60	0.90	120.00	10.80	13.30	12.75	56.3%	2	7
361	28	71.9%	0.45	0.05	1.00	125.00	15.40	18.20	25.00	61.4%	2	3
236	11	83.9%	0.30	0.00	0.95	130.00	—	—	—	—	—	—
203	6	101.0%	0.64	0.00	1.15	135.00	24.90	27.90	32.70	127.0%	—	4
535	389	103.5%	0.05	0.00	0.75	140.00	29.90	32.80	37.50	137.9%	1	0
126	1	121.2%	0.08	0.00	1.00	145.00	—	—	—	—	—	—
132	1	85.2%	0.10	0.00	0.05	150.00	—	—	—	—	—	—

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 RMBS put/call ratio?

For the October 16, 2026 expiration, the RMBS put/call ratio based on open interest is 0.43 (3,885 puts vs 9,109 calls), and 0.16 based on today's volume. A ratio above 1 means more puts than calls.

What is RMBS's implied volatility?

At-the-money implied volatility for RMBS options expiring October 16, 2026 is about 58.5%, an annualized estimate of how much the market expects Rambus stock to move.

How many RMBS option expiration dates are there?

RMBS 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.