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: Jan 21, 2028
Days to expiration: 469
Share price: $107.47
Put/call ratio (OI): 0.44
Put/call ratio (volume): 0.71
ATM implied volatility: 81.2%
Expected move: ±$98.93
Open interest (C / P): 3.16K / 1.39K

RMBS options summary

The RMBS options chain for the January 21, 2028 expiration lists 41 call and 28 put contracts, with 469 days until expiration. Open interest stands at 3,162 calls and 1,389 puts, a put/call ratio of 0.44, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $105.00 strike is 81.2%, which implies the market expects a move of about ±$98.93 (92.0%) in Rambus stock by expiration.

The most open interest sits at the $100.00 call (567 contracts) and the $70.00 put (573 contracts).

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

RMBS options chain · January 21, 2028

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
22	6	85.3%	67.50	66.50	71.00	45.00	2.80	4.70	3.40	70.8%	1	72
31	2	83.1%	49.00	65.00	68.40	47.50	2.50	5.30	5.00	68.0%	14	15
37	3	83.9%	70.90	63.00	67.50	50.00	2.70	6.30	5.92	67.7%	4	17
9	3	82.0%	59.60	59.50	64.00	55.00	4.00	7.30	6.87	66.3%	1	75
24	1	80.8%	55.85	56.00	61.00	60.00	5.70	7.80	8.57	64.2%	7	64
7	1	77.6%	58.70	53.00	56.60	65.00	7.10	10.30	13.81	64.9%	9	41
11	1	76.7%	57.50	50.00	53.70	70.00	8.90	11.60	10.34	63.5%	1	573
11	2	76.5%	49.61	47.00	51.50	75.00	11.30	13.40	11.10	63.4%	2	53
31	2	75.5%	44.00	44.00	49.00	80.00	12.70	16.40	14.60	63.1%	2	54
8	1	75.2%	28.30	43.00	47.50	82.50	13.60	17.40	14.97	62.4%	1	34
21	1	74.0%	48.39	41.50	45.80	85.00	14.70	18.80	16.72	62.4%	1	50
24	5	74.5%	42.80	40.50	45.00	87.50	15.80	20.00	17.66	62.1%	1	32
54	2	74.0%	41.96	39.50	43.50	90.00	16.50	21.50	18.85	61.5%	2	68
7	1	74.0%	31.00	38.00	43.00	92.50	21.50	26.50	28.08	70.3%	2	26
110	1	74.0%	44.20	37.00	42.00	95.00	19.50	24.00	21.05	61.5%	1	46
8	1	73.4%	44.00	36.00	40.50	97.50	21.50	25.50	29.10	62.2%	2	22
567	1	73.2%	41.70	35.00	39.50	100.00	23.10	26.00	24.20	61.2%	3	30
69	1	73.3%	34.00	33.00	38.00	105.00	38.00	41.60	41.00	89.1%	5	27
RMBS $107.47
57	3	73.2%	36.77	31.50	36.00	110.00	27.50	32.50	39.75	59.5%	1	20
21	9	72.9%	31.14	29.50	34.50	115.00	42.70	47.40	50.13	85.1%	1	16
44	3	72.4%	33.50	28.00	32.50	120.00	0.00	0.00	33.63	—	2	0
19	1	72.2%	32.88	26.50	31.00	125.00	37.50	42.00	53.34	58.6%	1	13
272	3	72.4%	28.34	25.00	30.00	130.00	56.60	60.70	53.37	90.8%	1	15
18	1	71.9%	29.50	23.50	28.50	135.00	60.40	64.50	50.50	90.7%	5	6
25	1	71.8%	17.74	22.50	27.00	140.00	63.00	68.00	52.00	89.0%	5	10
6	1	71.5%	12.85	21.00	26.00	145.00	69.20	72.00	55.00	91.5%	9	10
104	1	71.9%	23.90	20.90	24.30	150.00	0.00	0.00	55.00	—	—	0
4	1	71.7%	12.72	19.00	24.00	155.00	—	—	—	—	—	—
60	1	71.6%	24.00	18.00	23.00	160.00	—	—	—	—	—	—
43	2	70.7%	12.26	17.00	21.30	165.00	84.80	88.00	68.50	90.8%	1	0
92	2	70.9%	19.80	16.40	20.40	170.00	—	—	—	—	—	—
0	10	6.3%	18.60	0.00	0.00	175.00	—	—	—	—	—	—
363	1	71.2%	20.50	14.50	19.50	180.00	—	—	—	—	—	—
0	4	12.5%	16.74	0.00	0.00	185.00	—	—	—	—	—	—
73	2	71.0%	12.70	13.00	18.00	190.00	—	—	—	—	—	—
266	24	70.8%	11.80	12.50	17.00	195.00	—	—	—	—	—	—
207	3	70.0%	15.60	11.50	16.00	200.00	—	—	—	—	—	—
332	8	70.8%	15.30	10.50	15.50	210.00	—	—	—	—	—	—
3	1	70.8%	7.56	9.50	14.40	220.00	—	—	—	—	—	—
18	1	71.6%	11.20	9.90	12.80	230.00	—	—	—	—	—	—
84	1	72.1%	10.70	9.40	12.00	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 January 21, 2028 expiration, the RMBS put/call ratio based on open interest is 0.44 (1,389 puts vs 3,162 calls), and 0.71 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 January 21, 2028 is about 81.2%, 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.