UMC vs. RMBS

Last updated Apr 1, 2026

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

Performance

UMC vs. RMBS - Performance Comparison

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

UMC vs. RMBS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
UMC United Microelectronics Corporation	14.25%	28.65%	-19.01%	39.20%	-40.32%	43.16%	230.69%	56.10%	-21.85%	39.99%
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 UMC : $22.43B RMBS : $9.44B
EPS UMC : $16.62 RMBS : $2.11
PE Ratio UMC : 0.54 RMBS : 40.73
PS Ratio UMC : 0.09 RMBS : 13.26
PB Ratio UMC : 0.06 RMBS : 6.92
Total Revenue (TTM) UMC : $238.14B RMBS : $707.63M
Gross Profit (TTM) UMC : $68.91B RMBS : $537.56M
EBITDA (TTM) UMC : $109.50B RMBS : $307.44M

Returns By Period

In the year-to-date period, UMC achieves a 14.25% return, which is significantly higher than RMBS's -6.38% return. Both investments have delivered pretty close results over the past 10 years, with UMC having a 21.08% annualized return and RMBS not far behind at 20.04%.

UMC

• 1D: 4.30%
• 1M: -13.98%
• YTD: 14.25%
• 6M: 18.47%
• 1Y: 33.42%
• 3Y*: 7.30%
• 5Y*: 5.21%
• 10Y*: 21.08%

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

UMC vs. RMBS — Risk / Return Rank

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

UMC

UMC Risk / Return Rank: 70
UMC Sharpe Ratio Rank: 70
UMC Sortino Ratio Rank: 70
UMC Omega Ratio Rank: 66
UMC Calmar Ratio Rank: 71
UMC Martin Ratio Rank: 73

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.

UMC vs. RMBS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for United Microelectronics Corporation (UMC) 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.

	UMC	RMBS	Difference
Sharpe ratio Return per unit of total volatility	0.82	0.95	-0.13
Sortino ratio Return per unit of downside risk	1.54	1.64	-0.10
Omega ratio Gain probability vs. loss probability	1.19	1.21	-0.03
Calmar ratio Return relative to maximum drawdown	1.47	1.64	-0.17
Martin ratio Return relative to average drawdown	4.07	4.63	-0.56
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

UMC vs. RMBS - Sharpe Ratio Comparison

The current UMC Sharpe Ratio is 0.82, which is comparable to the RMBS Sharpe Ratio of 0.95. The chart below compares the historical Sharpe Ratios of UMC 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

	UMC	RMBS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.82	0.95	-0.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.14	0.65	-0.51
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.55	0.45	+0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.10	0.13	-0.02

Correlation

The correlation between UMC and RMBS 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

UMC vs. RMBS - Dividend Comparison

UMC's dividend yield for the trailing twelve months is around 5.30%, while RMBS has not paid dividends to shareholders.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
UMC United Microelectronics Corporation	5.30%	6.06%	7.14%	6.93%	7.92%	2.44%	1.62%	3.51%	6.59%	2.41%	3.61%	3.15%
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%

Drawdowns

UMC vs. RMBS - Drawdown Comparison

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

Drawdown Indicators

	UMC	RMBS	Difference
Max Drawdown Largest peak-to-trough decline	-72.52%	-97.16%	+24.64%
Max Drawdown (1Y) Largest decline over 1 year	-31.01%	-36.69%	+5.68%
Max Drawdown (5Y) Largest decline over 5 years	-54.30%	-48.83%	-5.47%
Max Drawdown (10Y) Largest decline over 10 years	-54.30%	-52.95%	-1.35%
Current Drawdown Current decline from peak	-28.04%	-31.68%	+3.64%
Average Drawdown Average peak-to-trough decline	-42.82%	-75.32%	+32.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	11.22%	13.00%	-1.78%

Volatility

UMC vs. RMBS - Volatility Comparison

The current volatility for United Microelectronics Corporation (UMC) is 11.07%, while Rambus Inc. (RMBS) has a volatility of 22.36%. This indicates that UMC 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

	UMC	RMBS	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.07%	22.36%	-11.29%
Volatility (6M) Calculated over the trailing 6-month period	34.25%	51.29%	-17.04%
Volatility (1Y) Calculated over the trailing 1-year period	41.96%	70.09%	-28.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	38.14%	51.88%	-13.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	38.40%	44.28%	-5.88%

Financials

UMC vs. RMBS - Profitability Comparison

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

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 - 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 - 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 - 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 - 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%.

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%.