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: May 21, 2027
Days to expiration: 224
Share price: $107.47
Put/call ratio (OI): 0.62
Put/call ratio (volume): 0.14
ATM implied volatility: 68.1%
Expected move: ±$57.37
Open interest (C / P): 263 / 164

RMBS options summary

The RMBS options chain for the May 21, 2027 expiration lists 16 call and 14 put contracts, with 224 days until expiration. Open interest stands at 263 calls and 164 puts, a put/call ratio of 0.62, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $105.00 strike is 68.1%, which implies the market expects a move of about ±$57.37 (53.4%) in Rambus stock by expiration.

The most open interest sits at the $120.00 call (104 contracts) and the $85.00 put (38 contracts).

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

RMBS options chain · May 21, 2027

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
—	—	—	—	—	—	45.00	0.05	2.90	1.75	78.6%	—	11
—	—	—	—	—	—	50.00	0.05	3.30	2.50	72.6%	1	6
—	—	—	—	—	—	55.00	0.60	3.70	3.50	69.5%	—	2
—	—	—	—	—	—	60.00	2.10	4.30	4.01	70.2%	5	9
—	—	—	—	—	—	70.00	3.60	6.70	5.80	66.7%	1	1
—	—	—	—	—	—	75.00	5.70	8.10	6.75	67.6%	1	1
2	1	74.7%	43.30	36.00	39.80	80.00	6.80	8.60	8.50	63.4%	5	11
1	1	74.0%	39.90	33.00	36.80	85.00	8.80	10.40	10.20	63.2%	3	38
3	—	73.4%	31.22	30.70	33.50	90.00	10.70	12.50	11.52	62.6%	1	34
0	1	72.5%	34.00	27.50	31.30	95.00	12.50	14.90	14.05	61.7%	1	6
8	2	72.1%	32.05	25.10	28.90	100.00	—	—	—	—	—	—
11	1	72.6%	26.20	23.40	26.70	105.00	17.70	21.70	20.00	63.6%	5	7
RMBS $107.47
35	4	72.5%	23.07	21.40	24.70	110.00	20.60	24.60	21.60	63.4%	5	12
5	5	71.5%	24.80	19.00	22.90	115.00	—	—	—	—	—	—
104	3	72.3%	21.93	17.80	21.30	120.00	26.80	29.90	29.10	61.2%	2	22
8	1	71.6%	16.90	16.20	19.40	125.00	30.60	34.20	30.20	62.9%	3	4
68	217	70.7%	15.90	14.90	17.30	130.00	—	—	—	—	—	—
7	3	71.8%	16.90	13.50	16.90	135.00	—	—	—	—	—	—
5	1	69.8%	13.20	11.80	14.90	140.00	—	—	—	—	—	—
1	1	70.9%	16.02	11.20	14.10	145.00	—	—	—	—	—	—
4	1	71.2%	14.34	9.70	13.80	150.00	—	—	—	—	—	—
1	1	71.1%	11.78	8.70	12.90	155.00	—	—	—	—	—	—

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 May 21, 2027 expiration, the RMBS put/call ratio based on open interest is 0.62 (164 puts vs 263 calls), and 0.14 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 May 21, 2027 is about 68.1%, 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.