RMBS vs. AMPX
RMBS (Rambus Inc.) and AMPX (Amprius Technologies Inc.) are both stocks. RMBS operates in Semiconductors (Technology), while AMPX operates in Electrical Equipment & Parts (Industrials). Over the past 3 years, RMBS returned 32.27%/yr vs 16.37%/yr for AMPX. At a 0.26 correlation, their price movements are largely independent.
Performance
RMBS vs. AMPX - Performance Comparison
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Returns By Period
In the year-to-date period, RMBS achieves a 59.50% return, which is significantly lower than AMPX's 106.72% return.
RMBS
- 1D
- 1.45%
- 1M
- 8.68%
- YTD
- 59.50%
- 6M
- 55.53%
- 1Y
- 141.61%
- 3Y*
- 32.27%
- 5Y*
- 49.08%
- 10Y*
- 28.27%
AMPX
- 1D
- -4.62%
- 1M
- -6.91%
- YTD
- 106.72%
- 6M
- 49.50%
- 1Y
- 313.96%
- 3Y*
- 16.37%
- 5Y*
- —
- 10Y*
- —
RMBS vs. AMPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | |
|---|---|---|---|---|---|
RMBS Rambus Inc. | 59.50% | 73.84% | -22.55% | 90.54% | 41.36% |
AMPX Amprius Technologies Inc. | 106.72% | 181.79% | -47.07% | -33.29% | -11.99% |
Correlation
The correlation between RMBS and AMPX is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.34 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.31 |
Correlation (All Time) Calculated using the full available price history since Sep 15, 2022 | 0.26 |
Fundamentals
RMBS:
$16.08B
AMPX:
$2.23B
RMBS:
$2.11
AMPX:
-$0.31
RMBS:
22.20
AMPX:
23.37
RMBS:
11.54
AMPX:
20.41
RMBS:
$721.16M
AMPX:
$90.26M
RMBS:
$555.52M
AMPX:
$16.37M
RMBS:
$298.07M
AMPX:
-$17.72M
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Return for Risk
RMBS vs. AMPX — Risk / Return Rank
RMBS
AMPX
RMBS vs. AMPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Rambus Inc. (RMBS) and Amprius Technologies Inc. (AMPX). 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.
| RMBS | AMPX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.06 | ||
| Sortino ratioReturn per unit of downside risk | -0.61 | ||
| Omega ratioGain probability vs. loss probability | 1.32 | 1.34 | -0.03 |
| Calmar ratioReturn relative to maximum drawdown | 3.88 | 6.82 | -2.93 |
| Martin ratioReturn relative to average drawdown | 9.73 | 16.45 | -6.72 |
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Drawdowns
RMBS vs. AMPX - Drawdown Comparison
The maximum RMBS drawdown since its inception was -97.16%, roughly equal to the maximum AMPX drawdown of -94.49%. Use the drawdown chart below to compare losses from any high point for RMBS and AMPX.
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Drawdown Indicators
| RMBS | AMPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -97.16% | -94.49% | -2.67% |
Max Drawdown (1Y)Largest decline over 1 year | -36.69% | -46.41% | +9.72% |
Max Drawdown (3Y)Largest decline over 3 years | -48.83% | -92.44% | +43.61% |
Max Drawdown (5Y)Largest decline over 5 years | -48.83% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -52.95% | — | — |
Current DrawdownCurrent decline from peak | -14.12% | -28.81% | +14.69% |
Average DrawdownAverage peak-to-trough decline | -74.88% | -54.95% | -19.93% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 14.62% | 19.19% | -4.57% |
Volatility
RMBS vs. AMPX - Volatility Comparison
The current volatility for Rambus Inc. (RMBS) is 28.11%, while Amprius Technologies Inc. (AMPX) has a volatility of 33.62%. This indicates that RMBS experiences smaller price fluctuations and is considered to be less risky than AMPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RMBS | AMPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 28.11% | 33.62% | -5.51% |
Volatility (6M)Calculated over the trailing 6-month period | 62.19% | 79.90% | -17.71% |
Volatility (1Y)Calculated over the trailing 1-year period | 76.00% | 109.24% | -33.24% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 55.40% | 128.75% | -73.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 46.30% | 128.75% | -82.45% |
Dividends
RMBS vs. AMPX - Dividend Comparison
Neither RMBS nor AMPX has paid dividends to shareholders.
Financials
RMBS vs. AMPX - Financials Comparison
This section allows you to compare key financial metrics between Rambus Inc. and Amprius Technologies 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
RMBS vs. AMPX - Profitability Comparison
RMBS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Rambus Inc. reported a gross profit of 143.66M and revenue of 180.19M. Therefore, the gross margin over that period was 79.7%.
AMPX - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Amprius Technologies Inc. reported a gross profit of 5.74M and revenue of 28.54M. Therefore, the gross margin over that period was 20.1%.
RMBS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Rambus Inc. reported an operating income of 61.76M and revenue of 180.19M, resulting in an operating margin of 34.3%.
AMPX - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Amprius Technologies Inc. reported an operating income of -6.69M and revenue of 28.54M, resulting in an operating margin of -23.4%.
RMBS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Rambus Inc. reported a net income of 59.86M and revenue of 180.19M, resulting in a net margin of 33.2%.
AMPX - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Amprius Technologies Inc. reported a net income of -5.05M and revenue of 28.54M, resulting in a net margin of -17.7%.
Frequently Asked Questions
RMBS and AMPX have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AMPX has higher volatility (33.62%) compared to RMBS (28.11%). In terms of maximum drawdown, RMBS dropped -97.16% vs AMPX's -94.49%.
AMPX currently has the higher Sharpe Ratio (2.93 vs 1.87), 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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