Rambus (RMBS) Options Chain

NASDAQ: RMBSTechnologySemiconductorsUSD

107.47-1.00 (-0.92%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $107.47
Put/call ratio (OI): 0.81
Put/call ratio (volume): 0.25
ATM implied volatility: 73.8%
Expected move: ±$26.25
Open interest (C / P): 5.99K / 4.84K

RMBS options summary

The RMBS options chain for the November 20, 2026 expiration lists 40 call and 30 put contracts, with 40 days until expiration. Open interest stands at 5,987 calls and 4,840 puts, a put/call ratio of 0.81, which is fairly balanced between calls and puts. At-the-money implied volatility near the $105.00 strike is 73.8%, which implies the market expects a move of about ±$26.25 (24.4%) in Rambus stock by expiration.

The most open interest sits at the $150.00 call (776 contracts) and the $100.00 put (697 contracts).

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

RMBS options chain · November 20, 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
0	79	—	45.80	0.00	0.00	47.50	0.00	1.05	0.05	139.1%	10	194
12	2	123.6%	42.40	56.40	59.30	50.00	0.00	1.15	0.10	133.5%	30	171
36	9	114.7%	56.57	50.90	55.00	55.00	0.00	1.70	0.35	128.8%	41	146
7	3	105.4%	52.35	46.00	50.10	60.00	0.10	1.90	0.30	118.8%	10	89
11	4	91.2%	47.77	41.10	44.90	65.00	0.10	2.00	0.21	106.3%	32	221
19	3	90.5%	39.49	36.40	40.40	70.00	0.25	1.25	0.43	86.0%	9	282
17	6	85.5%	38.50	31.70	35.80	75.00	0.50	1.40	0.80	79.0%	27	282
125	1	84.2%	30.84	27.80	31.10	80.00	0.75	1.75	1.15	73.0%	13	288
34	3	78.4%	32.15	25.10	28.90	82.50	1.00	2.45	1.40	74.3%	1	483
22	2	78.8%	28.00	23.20	26.90	85.00	1.45	2.90	2.47	74.0%	16	391
11	4	78.8%	27.97	21.90	24.40	87.50	1.70	3.10	3.10	70.3%	2	218
427	1	75.5%	26.00	19.50	22.50	90.00	2.25	3.90	3.59	71.0%	3	219
83	5	75.9%	18.60	17.80	20.80	92.50	2.75	5.50	3.74	74.0%	2	52
54	1	77.5%	23.05	16.60	19.10	95.00	4.30	5.70	5.14	74.3%	21	198
46	2	75.5%	14.10	14.30	17.80	97.50	4.50	6.60	5.83	71.3%	1	87
244	1	75.9%	14.30	13.60	15.70	100.00	6.20	9.00	7.36	79.1%	11	697
484	4	80.3%	12.20	11.80	13.50	105.00	7.10	9.60	9.61	67.3%	1	170
RMBS $107.47
333	284	75.0%	9.60	8.80	10.50	110.00	11.40	13.50	12.37	76.8%	1	70
488	90	76.3%	7.30	7.60	8.30	115.00	13.50	15.70	13.10	70.1%	1	33
539	28	75.5%	6.00	5.60	6.90	120.00	17.30	19.80	18.63	73.8%	2	86
169	24	74.0%	7.90	3.10	6.40	125.00	20.70	24.20	19.30	75.3%	3	75
221	6	81.8%	3.70	3.50	5.80	130.00	24.70	27.60	30.80	73.2%	20	357
155	17	80.6%	3.04	2.70	4.50	135.00	28.70	32.40	34.00	75.3%	1	10
106	270	77.8%	2.50	1.75	3.40	140.00	0.00	0.00	42.65	—	3	0
35	3	79.1%	3.15	1.15	3.10	145.00	59.20	61.70	60.20	238.0%	1	7
776	4	79.5%	1.25	1.05	2.35	150.00	42.50	45.70	38.20	77.9%	1	14
114	1	80.2%	1.37	0.40	2.35	155.00	—	—	—	—	—	—
32	20	82.3%	1.49	0.05	2.35	160.00	0.00	0.00	68.00	—	1	0
305	2	86.9%	1.33	0.05	2.35	165.00	0.00	0.00	35.00	—	1	0
223	161	90.3%	1.37	0.05	2.25	170.00	—	—	—	—	—	—
10	1	94.0%	0.95	0.05	2.20	175.00	—	—	—	—	—	—
101	3	90.2%	0.80	0.25	1.25	180.00	—	—	—	—	—	—
28	2	100.3%	0.69	0.00	2.10	185.00	—	—	—	—	—	—
39	2	103.4%	0.32	0.00	2.05	190.00	—	—	—	—	—	—
17	2	106.3%	0.10	0.00	2.00	195.00	—	—	—	—	—	—
77	1	109.2%	0.44	0.00	1.95	200.00	110.70	115.00	100.00	284.2%	1	0
9	1	115.0%	0.10	0.00	1.90	210.00	—	—	—	—	—	—
41	2	119.7%	0.38	0.00	1.80	220.00	—	—	—	—	—	—
83	32	123.4%	0.41	0.00	1.65	230.00	142.60	146.50	142.40	321.1%	1	0
454	1	88.7%	0.09	0.00	0.10	240.00	—	—	—	—	—	—

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 November 20, 2026 expiration, the RMBS put/call ratio based on open interest is 0.81 (4,840 puts vs 5,987 calls), and 0.25 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 November 20, 2026 is about 73.8%, 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.