AMBA vs. RMBS

Last updated Apr 1, 2026

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

Performance

AMBA vs. RMBS - Performance Comparison

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

AMBA vs. RMBS - Yearly Performance Comparison

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

Fundamentals

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

Returns By Period

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

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%

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%

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

Return for Risk

AMBA vs. RMBS — Risk / Return Rank

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

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

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

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.

AMBA vs. RMBS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ambarella, Inc. (AMBA) and Rambus Inc. (RMBS). 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.

	AMBA	RMBS	Difference
Sharpe ratio Return per unit of total volatility	0.03	0.95	-0.92
Sortino ratio Return per unit of downside risk	0.54	1.64	-1.10
Omega ratio Gain probability vs. loss probability	1.08	1.21	-0.14
Calmar ratio Return relative to maximum drawdown	0.03	1.64	-1.61
Martin ratio Return relative to average drawdown	0.08	4.63	-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.

AMBA vs. RMBS - Sharpe Ratio Comparison

The current AMBA Sharpe Ratio is 0.03, which is lower than the RMBS Sharpe Ratio of 0.95. The chart below compares the historical Sharpe Ratios of AMBA and RMBS, 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

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

Correlation

The correlation between AMBA and RMBS 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

AMBA vs. RMBS - Dividend Comparison

Neither AMBA nor RMBS has paid dividends to shareholders.

Tickers have no history of dividend payments

Drawdowns

AMBA vs. RMBS - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

AMBA vs. RMBS - Volatility Comparison

The current volatility for Ambarella, Inc. (AMBA) is 13.61%, while Rambus Inc. (RMBS) has a volatility of 22.36%. This indicates that AMBA experiences smaller price fluctuations and is considered to be less risky than RMBS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

Financials

AMBA vs. RMBS - Profitability Comparison

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

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 - 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 - 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 - 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 - 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%.

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%.