AMBA vs. RMBS
AMBA (Ambarella, Inc.) and RMBS (Rambus Inc.) are both stocks. Both are in the Technology sector — AMBA in Semiconductor Equipment & Materials, RMBS in Semiconductors. Over the past 10 years, AMBA returned 4.28%/yr vs 21.34%/yr for RMBS. Their 0.49 correlation means their historical movements had little consistent relationship.
Performance
AMBA vs. RMBS - Performance Comparison
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Returns By Period
In the year-to-date period, AMBA achieves a 21.40% return, which is significantly higher than RMBS's -0.94% return. Over the past 10 years, AMBA has underperformed RMBS with an annualized return of 4.28%, while RMBS has yielded a comparatively higher 21.34% annualized return.
AMBA
- 1D
- 16.08%
- 1M
- 9.75%
- 6M
- 34.29%
- YTD
- 21.40%
- 1Y
- 34.92%
- 3Y*
- 0.78%
- 5Y*
- -2.68%
- 10Y*
- 4.28%
- ALL TIME*
- 20.30%
RMBS
- 1D
- 1.62%
- 1M
- -19.39%
- 6M
- -20.03%
- YTD
- -0.94%
- 1Y
- 25.71%
- 3Y*
- 18.38%
- 5Y*
- 30.93%
- 10Y*
- 21.34%
- ALL TIME*
- 9.76%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
AMBA Ambarella, Inc. | $192.92M | $151.48M | $136.93M |
RMBS Rambus Inc. | $291.91M | $305.93M | $370.74M |
AMBA vs. RMBS - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AMBA Ambarella, Inc. | 21.40% | -2.61% | 18.68% | -25.47% | -59.47% | 120.96% | 51.62% | 73.13% | -40.46% | 8.54% |
RMBS Rambus Inc. | -0.94% | 73.84% | -22.55% | 90.54% | 21.88% | 68.33% | 26.75% | 79.60% | -46.06% | 3.27% |
Correlation
The correlation between AMBA and RMBS is 0.60, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.60 |
Correlation (3Y) Balances recent behavior with more history. | 0.60 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.61 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.56 |
Correlation (All Time) Calculated using the full available price history since Oct 10, 2012 | 0.49 |
The correlation between AMBA and RMBS shifts across timeframes, from 0.49 (all time) to 0.61 (5 years), reflecting how their relationship changes across market environments.
Fundamentals
AMBA:
$3.77B
RMBS:
$9.87B
AMBA:
-$1.62
RMBS:
$2.19
AMBA:
9.15
RMBS:
13.19
AMBA:
6.19
RMBS:
6.82
AMBA:
$405.19M
RMBS:
$756.33M
AMBA:
$238.32M
RMBS:
$591.98M
AMBA:
-$69.43M
RMBS:
$331.39M
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Return for Risk
AMBA vs. RMBS — Risk / Return Rank
AMBA
RMBS
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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| AMBA | RMBS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.11 | ||
| Sortino ratioReturn per unit of downside risk | +0.12 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.12 | +0.03 |
| Calmar ratioReturn relative to maximum drawdown | 0.62 | 0.45 | +0.17 |
| Martin ratioReturn relative to average drawdown | 1.19 | 1.19 | 0.00 |
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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.
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Drawdown Indicators
| AMBA | RMBS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -81.65% | -97.16% | +15.51% |
Max Drawdown (1Y)Largest decline over 1 year | -49.06% | -51.48% | +2.42% |
Max Drawdown (3Y)Largest decline over 3 years | -51.41% | -51.48% | +0.07% |
Max Drawdown (5Y)Largest decline over 5 years | -81.65% | -51.48% | -30.17% |
Max Drawdown (10Y)Largest decline over 10 years | -81.65% | -52.95% | -28.70% |
Current DrawdownCurrent decline from peak | -60.34% | -46.66% | -13.68% |
Average DrawdownAverage peak-to-trough decline | -48.60% | -74.70% | +26.10% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 25.45% | 19.45% | +6.00% |
Volatility
AMBA vs. RMBS - Volatility Comparison
Ambarella, Inc. (AMBA) has a higher volatility of 30.03% compared to Rambus Inc. (RMBS) at 22.08%. This indicates that AMBA's price experiences larger fluctuations and is considered to be riskier than RMBS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AMBA | RMBS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 30.03% | 22.08% | +7.95% |
Volatility (6M)Calculated over the trailing 6-month period | 60.80% | 64.38% | -3.58% |
Volatility (1Y)Calculated over the trailing 1-year period | 76.25% | 80.06% | -3.81% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 65.85% | 56.88% | +8.97% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 58.34% | 47.18% | +11.16% |
Dividends
AMBA vs. RMBS - Dividend Comparison
Neither AMBA nor RMBS has paid dividends to shareholders.
Financials
AMBA vs. RMBS - Financials Comparison
This section allows you to compare key financial metrics between Ambarella, Inc. and Rambus Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
AMBA vs. RMBS - Profitability Comparison
AMBA - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Ambarella, Inc. reported a gross profit of 58.59M and revenue of 100.36M. Therefore, the gross margin over that period was 58.4%.
RMBS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Rambus Inc. reported a gross profit of 165.41M and revenue of 207.39M. Therefore, the gross margin over that period was 79.8%.
AMBA - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Ambarella, Inc. reported an operating income of -19.42M and revenue of 100.36M, resulting in an operating margin of -19.4%.
RMBS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Rambus Inc. reported an operating income of 72.73M and revenue of 207.39M, resulting in an operating margin of 35.1%.
AMBA - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Ambarella, Inc. reported a net income of -18.09M and revenue of 100.36M, resulting in a net margin of -18.0%.
RMBS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Rambus Inc. reported a net income of 67.61M and revenue of 207.39M, resulting in a net margin of 32.6%.
Frequently Asked Questions
AMBA and RMBS have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AMBA has higher volatility (30.03%) compared to RMBS (22.08%). In terms of maximum drawdown, AMBA dropped -81.65% vs RMBS's -97.16%.
AMBA currently has the higher Sharpe Ratio (0.40 vs 0.29), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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