Should You Buy The Dip In Rambus Stock?
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Shares of Rambus (RMBS) fell 22.1% in the three weeks from their close on October 6 to their close on October 27. A drop this fast tempts investors to buy while the price is lower or to sell before the price falls further. What happened to people who bought Rambus after its earlier falls this deep?
Rambus Shares Were Higher A Year After Most Drops
Since the start of 2010, Rambus stock has recorded 21 drops of more than 20% over 30 trading days. Nineteen of those selloffs have a full year of subsequent trading data, and 13 of those instances left the shares higher a year later. Over that year, the median result was a gain of 42.0%. Six of the historical drops ended the year lower, and the worst was a 69.0% fall following the decline of May 2011. The drops of March and July 2026 are too recent to judge.
Harvesting those gains took patience. In the median case, shares at some point closed 18.0% below their price on the day of the initial drop. The highest price of the following year arrived a median 315 days, or about ten months, after the drop.
| Time after a past dip | Past dips with that much time after them | Median RMBS price change |
|---|---|---|
| 21 trading days | 21 | 1.0% |
| 63 trading days | 21 | 10.0% |
| 126 trading days | 20 | 21.5% |
| 252 trading days | 19 | 42.0% |
| Dip date | RMBS price change over the 30 trading days to the dip date | SPY price change over the same days | RMBS price change 252 trading days after the dip date | Highest price in those 252 trading days, against the dip-date price | Calendar days to that highest price | Lowest price in those 252 trading days, against the dip-date price |
|---|---|---|---|---|---|---|
| 2026-07-07 | -25.3% | 1.0% | window not complete | window not complete | window not complete | window not complete |
| 2026-03-05 | -27.0% | -1.0% | window not complete | window not complete | window not complete | window not complete |
| 2025-04-01 | -23.8% | -8.0% | 76.0% | 140.8% | 295 | -18.0% |
| 2024-08-01 | -20.9% | -1.0% | 59.0% | 68.7% | 368 | -15.6% |
| 2024-02-06 | -20.3% | 5.0% | 21.0% | 22.6% | 365 | -31.5% |
| 2022-06-16 | -22.7% | -15.0% | 188.0% | 220.6% | 344 | -0.771% |
| 2022-05-06 | -20.5% | -9.0% | 84.0% | 96.6% | 329 | -20.1% |
| 2020-03-09 | -21.2% | -17.0% | 67.0% | 87.4% | 347 | -21.3% |
| 2018-12-24 | -20.8% | -16.0% | 92.0% | 98.8% | 317 | 0% |
| 2018-10-10 | -22.1% | -4.0% | 42.0% | 49.1% | 338 | -22.7% |
| 2015-09-22 | -22.5% | -7.0% | 16.0% | 33.4% | 350 | -7.5% |
| 2014-10-24 | -20.3% | -2.0% | -2.0% | 47.9% | 230 | -4.0% |
| 2014-07-31 | -21.5% | -1.0% | 14.0% | 33.9% | 315 | -12.4% |
| 2013-09-03 | -22.2% | -3.0% | 44.0% | 77.0% | 290 | -1.4% |
| 2012-11-13 | -20.8% | -4.0% | 105.0% | 143.1% | 251 | -7.3% |
| 2012-07-26 | -25.7% | 4.0% | 149.0% | 170.8% | 361 | 0% |
| 2012-03-02 | -21.9% | 4.0% | -18.0% | 0.734% | 17 | -42.1% |
| 2011-11-16 | -54.1% | 8.0% | -36.0% | 29.4% | 70 | -44.6% |
| 2011-08-08 | -26.8% | -11.0% | -55.0% | 76.2% | 92 | -62.1% |
| 2011-05-16 | -25.4% | 0.0% | -69.0% | 24.9% | 176 | -69.5% |
| 2010-06-09 | -24.1% | -10.0% | -24.0% | 21.2% | 253 | -27.6% |
| Median of 19 complete windows | – | – | 42.0% | 68.7% | 315 | -18.0% |
Rambus Sales And Profit Rose From A Year Earlier
Rambus, a seller of chips and IP, reported revenue of $218 million for its fiscal third quarter of 2026, which ended September 30, marking a 22.3% increase from a year earlier. Profit grew faster than sales as the company’s operating margin rose to 38.4% from 35.4% in the same quarter of 2025. On the October 26 call, management said product revenue reached a new all-time high.
Rambus converts much of that profit into cash. Operations generated $102 million in cash flow during the quarter, representing 46.9% of revenue. At the end of September, the company held $777 million in cash and short-term investments against $20.2 million of debt.
Buyers still pay a premium for the business even after the recent drop. Rambus stock trades at 36.0 times its earnings over the last twelve months, compared with 22.6 times for the S&P 500.
Rambus Management Expects Tight Supply Into 2027
During the October 26 call, management said demand remains strong heading into 2027, but supply will remain tight. Rising input costs across the supply chain are pushing the gross margin on product sales toward the lower end of management’s long-term target of 60% to 65%. Rambus has cut its own costs to keep that margin in a near-term range of 60% to 63%, and expects 2026 to land in the middle of the 60% to 63% range.
Management guided for fourth-quarter product revenue of $127 million to $133 million, a figure up 34% from a year earlier at the midpoint. How product revenue measures against that guide is the number to watch when Rambus is expected to report in February 2027.
Most investors who bought past Rambus drops found themselves ahead a year later, though they typically endured a further fall first. The business today is growing and profitable, holding far more cash than debt, and buyers pay well above the market’s multiple to own it. Purchasing the stock now means betting that Rambus can keep growing its product sales while supply stays tight. Is that what you expect from Rambus?
How To Act On RMBS?
Now you know Rambus better. Our purpose is to inform you so you can decide for yourself, and acting on one stock, in either direction, carries its own risk.
If you would rather own a portfolio built to spread that risk, the Trefis High Quality (HQ) Portfolio holds 30 quality companies in equal weight. Since its inception in September 2020 it has returned 105%, ahead of a benchmark that combines the S&P 500, S&P Mid-cap and Russell 2000.
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