RMBS vs. AMBA

Last updated Apr 1, 2026

Compare and contrast key facts about Rambus Inc. (RMBS) and Ambarella, Inc. (AMBA).

Performance

RMBS vs. AMBA - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rambus Inc. (RMBS) and Ambarella, Inc. (AMBA). The values are adjusted to include any dividend payments, if applicable.

RMBS vs. AMBA - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RMBS Rambus Inc.	-6.38%	73.84%	-22.55%	90.54%	21.88%	68.33%	26.75%	79.60%	-46.06%	3.27%
AMBA Ambarella, Inc.	-27.34%	-2.61%	18.68%	-25.47%	-59.47%	120.96%	51.62%	73.13%	-40.46%	8.54%

Fundamentals

Market Cap RMBS : $9.44B AMBA : $2.22B
EPS RMBS : $2.11 AMBA : -$1.78
PS Ratio RMBS : 13.26 AMBA : 5.61
PB Ratio RMBS : 6.92 AMBA : 3.74
Total Revenue (TTM) RMBS : $707.63M AMBA : $390.70M
Gross Profit (TTM) RMBS : $537.56M AMBA : $231.27M
EBITDA (TTM) RMBS : $307.44M AMBA : -$71.46M

Returns By Period

In the year-to-date period, RMBS achieves a -6.38% return, which is significantly higher than AMBA's -27.34% return. Over the past 10 years, RMBS has outperformed AMBA with an annualized return of 20.04%, while AMBA has yielded a comparatively lower 1.48% annualized return.

RMBS

• 1D: 7.90%
• 1M: -13.68%
• YTD: -6.38%
• 6M: -17.44%
• 1Y: 66.16%
• 3Y*: 18.84%
• 5Y*: 33.46%
• 10Y*: 20.04%

AMBA

• 1D: 5.81%
• 1M: -14.69%
• YTD: -27.34%
• 6M: -37.62%
• 1Y: 2.27%
• 3Y*: -12.72%
• 5Y*: -13.33%
• 10Y*: 1.48%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Return for Risk

RMBS vs. AMBA — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

RMBS

RMBS Risk / Return Rank: 73
RMBS Sharpe Ratio Rank: 74
RMBS Sortino Ratio Rank: 72
RMBS Omega Ratio Rank: 71
RMBS Calmar Ratio Rank: 73
RMBS Martin Ratio Rank: 76

AMBA

AMBA Risk / Return Rank: 43
AMBA Sharpe Ratio Rank: 43
AMBA Sortino Ratio Rank: 44
AMBA Omega Ratio Rank: 44
AMBA Calmar Ratio Rank: 42
AMBA Martin Ratio Rank: 43

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

RMBS vs. AMBA - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rambus Inc. (RMBS) and Ambarella, Inc. (AMBA). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	RMBS	AMBA	Difference
Sharpe ratio Return per unit of total volatility	0.95	0.03	+0.92
Sortino ratio Return per unit of downside risk	1.64	0.54	+1.10
Omega ratio Gain probability vs. loss probability	1.21	1.08	+0.14
Calmar ratio Return relative to maximum drawdown	1.64	0.03	+1.61
Martin ratio Return relative to average drawdown	4.63	0.08	+4.55
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RMBS vs. AMBA - Sharpe Ratio Comparison

The current RMBS Sharpe Ratio is 0.95, which is higher than the AMBA Sharpe Ratio of 0.03. The chart below compares the historical Sharpe Ratios of RMBS and AMBA, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	RMBS	AMBA	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.95	0.03	+0.92
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.65	-0.22	+0.87
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.03	+0.43
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.30	-0.18

Correlation

The correlation between RMBS and AMBA is 0.48, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

RMBS vs. AMBA - Dividend Comparison

Neither RMBS nor AMBA has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

RMBS vs. AMBA - Drawdown Comparison

The maximum RMBS drawdown since its inception was -97.16%, which is greater than AMBA's maximum drawdown of -81.65%. Use the drawdown chart below to compare losses from any high point for RMBS and AMBA.

Drawdown Indicators

	RMBS	AMBA	Difference
Max Drawdown Largest peak-to-trough decline	-97.16%	-81.65%	-15.51%
Max Drawdown (1Y) Largest decline over 1 year	-36.69%	-49.06%	+12.37%
Max Drawdown (5Y) Largest decline over 5 years	-48.83%	-81.65%	+32.82%
Max Drawdown (10Y) Largest decline over 10 years	-52.95%	-81.65%	+28.70%
Current Drawdown Current decline from peak	-31.68%	-76.26%	+44.58%
Average Drawdown Average peak-to-trough decline	-75.32%	-48.11%	-27.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.00%	20.25%	-7.25%

Volatility

RMBS vs. AMBA - Volatility Comparison

Rambus Inc. (RMBS) has a higher volatility of 22.36% compared to Ambarella, Inc. (AMBA) at 13.61%. This indicates that RMBS's price experiences larger fluctuations and is considered to be riskier than AMBA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RMBS	AMBA	Difference
Volatility (1M) Calculated over the trailing 1-month period	22.36%	13.61%	+8.75%
Volatility (6M) Calculated over the trailing 6-month period	51.29%	46.82%	+4.47%
Volatility (1Y) Calculated over the trailing 1-year period	70.09%	67.07%	+3.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.88%	61.74%	-9.86%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	44.28%	56.05%	-11.77%

Financials

RMBS vs. AMBA - Profitability Comparison

The chart below illustrates the profitability comparison between Rambus Inc. and Ambarella, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

RMBS - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Rambus Inc. reported a gross profit of 150.03M and revenue of 190.24M. Therefore, the gross margin over that period was 78.9%.

AMBA - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Ambarella, Inc. reported a gross profit of 58.16M and revenue of 100.87M. Therefore, the gross margin over that period was 57.7%.

RMBS - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Rambus Inc. reported an operating income of 70.83M and revenue of 190.24M, resulting in an operating margin of 37.2%.

AMBA - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Ambarella, Inc. reported an operating income of -19.65M and revenue of 100.87M, resulting in an operating margin of -19.5%.

RMBS - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Rambus Inc. reported a net income of 63.84M and revenue of 190.24M, resulting in a net margin of 33.6%.

AMBA - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Ambarella, Inc. reported a net income of -16.44M and revenue of 100.87M, resulting in a net margin of -16.3%.