RMBS vs. UMC

Last updated Apr 2, 2026

Compare and contrast key facts about Rambus Inc. (RMBS) and United Microelectronics Corporation (UMC).

Performance

RMBS vs. UMC - Performance Comparison

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

RMBS vs. UMC - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RMBS Rambus Inc.	-2.11%	73.84%	-22.55%	90.54%	21.88%	68.33%	26.75%	79.60%	-46.06%	3.27%
UMC United Microelectronics Corporation	14.12%	28.65%	-19.01%	39.20%	-40.32%	43.16%	230.69%	56.10%	-21.85%	39.99%

Fundamentals

Market Cap RMBS : $9.87B UMC : $22.40B
EPS RMBS : $2.11 UMC : $16.62
PE Ratio RMBS : 42.59 UMC : 0.54
PS Ratio RMBS : 13.87 UMC : 0.09
PB Ratio RMBS : 7.23 UMC : 0.06
Total Revenue (TTM) RMBS : $707.63M UMC : $238.14B
Gross Profit (TTM) RMBS : $537.56M UMC : $68.91B
EBITDA (TTM) RMBS : $307.44M UMC : $109.50B

Returns By Period

In the year-to-date period, RMBS achieves a -2.11% return, which is significantly lower than UMC's 14.12% return. Both investments have delivered pretty close results over the past 10 years, with RMBS having a 20.57% annualized return and UMC not far ahead at 21.07%.

RMBS

• 1D: 4.56%
• 1M: -9.03%
• YTD: -2.11%
• 6M: -12.79%
• 1Y: 72.02%
• 3Y*: 20.62%
• 5Y*: 34.65%
• 10Y*: 20.57%

UMC

• 1D: -0.11%
• 1M: -14.65%
• YTD: 14.12%
• 6M: 21.05%
• 1Y: 36.51%
• 3Y*: 7.26%
• 5Y*: 5.18%
• 10Y*: 21.07%

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

Return for Risk

RMBS vs. UMC — Risk / Return Rank

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

RMBS

RMBS Risk / Return Rank: 74
RMBS Sharpe Ratio Rank: 74
RMBS Sortino Ratio Rank: 72
RMBS Omega Ratio Rank: 71
RMBS Calmar Ratio Rank: 76
RMBS Martin Ratio Rank: 78

UMC

UMC Risk / Return Rank: 68
UMC Sharpe Ratio Rank: 71
UMC Sortino Ratio Rank: 70
UMC Omega Ratio Rank: 67
UMC Calmar Ratio Rank: 64
UMC Martin Ratio Rank: 67

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. UMC - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rambus Inc. (RMBS) and United Microelectronics Corporation (UMC). 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	UMC	Difference
Sharpe ratio Return per unit of total volatility	1.03	0.90	+0.14
Sortino ratio Return per unit of downside risk	1.72	1.64	+0.08
Omega ratio Gain probability vs. loss probability	1.22	1.20	+0.02
Calmar ratio Return relative to maximum drawdown	2.01	1.07	+0.94
Martin ratio Return relative to average drawdown	5.62	2.95	+2.67
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. UMC - Sharpe Ratio Comparison

The current RMBS Sharpe Ratio is 1.03, which is comparable to the UMC Sharpe Ratio of 0.90. The chart below compares the historical Sharpe Ratios of RMBS and UMC, 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	UMC	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.03	0.90	+0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.67	0.14	+0.53
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.47	0.55	-0.08
Sharpe Ratio (All Time) Calculated using the full available price history	0.13	0.10	+0.03

Correlation

The correlation between RMBS and UMC is 0.40, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

RMBS vs. UMC - Dividend Comparison

RMBS has not paid dividends to shareholders, while UMC's dividend yield for the trailing twelve months is around 5.31%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RMBS Rambus Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
UMC United Microelectronics Corporation	5.31%	6.06%	7.14%	6.93%	7.92%	2.44%	1.62%	3.51%	6.59%	2.41%	3.61%	3.15%

Drawdowns

RMBS vs. UMC - Drawdown Comparison

The maximum RMBS drawdown since its inception was -97.16%, which is greater than UMC's maximum drawdown of -72.52%. Use the drawdown chart below to compare losses from any high point for RMBS and UMC.

Drawdown Indicators

	RMBS	UMC	Difference
Max Drawdown Largest peak-to-trough decline	-97.16%	-72.52%	-24.64%
Max Drawdown (1Y) Largest decline over 1 year	-36.69%	-31.01%	-5.68%
Max Drawdown (5Y) Largest decline over 5 years	-48.83%	-54.30%	+5.47%
Max Drawdown (10Y) Largest decline over 10 years	-52.95%	-54.30%	+1.35%
Current Drawdown Current decline from peak	-28.57%	-28.13%	-0.44%
Average Drawdown Average peak-to-trough decline	-75.32%	-42.81%	-32.51%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.13%	11.29%	+1.84%

Volatility

RMBS vs. UMC - Volatility Comparison

Rambus Inc. (RMBS) has a higher volatility of 19.38% compared to United Microelectronics Corporation (UMC) at 9.62%. This indicates that RMBS's price experiences larger fluctuations and is considered to be riskier than UMC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RMBS	UMC	Difference
Volatility (1M) Calculated over the trailing 1-month period	19.38%	9.62%	+9.76%
Volatility (6M) Calculated over the trailing 6-month period	51.49%	34.25%	+17.24%
Volatility (1Y) Calculated over the trailing 1-year period	70.11%	40.98%	+29.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.88%	38.13%	+13.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	44.29%	38.39%	+5.90%

Financials

RMBS vs. UMC - Profitability Comparison

The chart below illustrates the profitability comparison between Rambus Inc. and United Microelectronics Corporation 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%.

UMC - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, United Microelectronics Corporation reported a gross profit of 18.96B and revenue of 62.39B. Therefore, the gross margin over that period was 30.4%.

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%.

UMC - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, United Microelectronics Corporation reported an operating income of 12.23B and revenue of 62.39B, resulting in an operating margin of 19.6%.

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%.

UMC - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, United Microelectronics Corporation reported a net income of 10.06B and revenue of 62.39B, resulting in a net margin of 16.1%.