Rambus (FRA:RMB) Cyclically Adjusted PB Ratio: (As of Sep. 22, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

FRA:RMB Rambus Inc FRA:RMB
91 GF Score
Price €84.80
GF Value €83.74
Valuation Fairly Valued
! 1 Warning Sign
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What is Rambus Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Rambus  (FRA:RMB) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.


Rambus Cyclically Adjusted PB Ratio Related Terms


Rambus Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Rambus's Cyclically Adjusted PB Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Rambus Cyclically Adjusted PB Ratio Chart

Rambus Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 4.66 5.34 8.69 6.48 9.15

Rambus Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 6.58 10.51 9.25 8.03 12.35

FRA:RMB vs SWKS, QRVO, SIMO: Cyclically Adjusted PB Ratio Comparison

For the Semiconductors subindustry, Rambus's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Rambus Cyclically Adjusted PB Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Rambus's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Rambus's Cyclically Adjusted PB Ratio falls into.


FRA:RMB
91GF Score
Rambus Inc FRA:RMB
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Rambus Cyclically Adjusted PB Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.

Rambus's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Rambus's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book=Book Value per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=11.827/333.9520*333.9520
=11.827

Current CPI (Jun. 2026) = 333.9520.

Rambus Quarterly Data

Book Value per Share CPI Adj_Book
201609 4.454 241.428 6.161
201612 4.719 241.432 6.527
201703 5.034 243.801 6.895
201706 4.575 244.955 6.237
201709 4.543 246.819 6.147
201712 4.337 246.524 5.875
201803 8.465 249.554 11.328
201806 8.821 251.989 11.690
201809 8.001 252.439 10.585
201812 8.121 251.233 10.795
201903 8.066 254.202 10.597
201906 7.690 256.143 10.026
201909 7.909 256.759 10.287
201912 7.714 256.974 10.025
202003 7.770 258.115 10.053
202006 7.555 257.797 9.787
202009 7.173 260.280 9.203
202012 6.678 260.474 8.562
202103 6.878 264.877 8.672
202106 6.432 271.696 7.906
202109 6.689 274.310 8.143
202112 6.939 278.802 8.312
202203 6.466 287.504 7.511
202206 7.254 296.311 8.175
202209 7.122 296.808 8.013
202212 6.786 296.797 7.636
202303 6.441 301.836 7.126
202306 7.942 305.109 8.693
202309 8.395 307.789 9.109
202312 8.713 306.746 9.486
202403 8.519 312.332 9.109
202406 8.915 314.175 9.476
202409 8.735 315.301 9.252
202412 10.130 315.605 10.719
202503 9.996 319.799 10.438
202506 9.723 322.561 10.066
202509 10.187 324.800 10.474
202512 10.779 324.054 11.108
202603 11.182 330.213 11.309
202606 11.827 333.952 11.827

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

Is Rambus (FRA:RMB) Overvalued in 2026?

Based on GuruFocus' analysis, Rambus stock appears to be overvalued. The current stock price of €84.80 is trading 1.3% above its estimated GF Value™ of €83.74. GuruFocus considers Rambus to be Fairly Valued.

Key valuation signals for FRA:RMB:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €83.74 vs. price of €84.80 (1.3% above fair value)
  • GF Score™: 91/100 with 1 warning sign

No single metric tells the full story. See the FRA:RMB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Rambus Business Description

Other Exchanges RMBS:USA1RMBS:Italy0QYL:UK
Address 4453 North First Street, Suite 100, San Jose, CA, USA, 95134
Rambus Inc is a semiconductor company providing chips and silicon IP for data-intensive computing systems, focusing on data center and artificial intelligence (AI) infrastructure. The company is at the forefront of enabling the next era of AI-driven computing, addressing challenges of signal and power integrity at increasingly extreme data rates across the data center, edge, and client markets. It offers high-performance memory subsystems, with a balanced and diverse portfolio of products, IP, and patents that maximize performance and security in computationally intensive systems. The company operates in South Korea, Singapore, the United States, and other countries, with the majority of its revenue coming from South Korea.
91GF Score

Get the complete analysis for FRA:RMB

Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€84.80
Price
€83.74
GF Value