MYFRX vs. GIYIX

Last updated Jun 23, 2026

MYFRX (Pioneer Multi-Asset Ultrashort Income Fund) and GIYIX (Guggenheim Ultra Short Duration Fund) are both Ultrashort Bond funds. Over the past 5 years, MYFRX returned 3.89%/yr vs 3.85%/yr for GIYIX. At a 0.33 correlation, their price movements are largely independent. MYFRX charges 0.44%/yr vs 0.34%/yr for GIYIX.

Performance

MYFRX vs. GIYIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pioneer Multi-Asset Ultrashort Income Fund (MYFRX) and Guggenheim Ultra Short Duration Fund (GIYIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with MYFRX having a 1.62% return and GIYIX slightly higher at 1.63%.

MYFRX

• 1D: 0.00%
• 1M: 0.37%
• YTD: 1.62%
• 6M: 1.93%
• 1Y: 4.25%
• 3Y*: 5.26%
• 5Y*: 3.89%
• 10Y*: 2.83%

GIYIX

• 1D: 0.00%
• 1M: 0.37%
• YTD: 1.63%
• 6M: 2.03%
• 1Y: 4.67%
• 3Y*: 6.00%
• 5Y*: 3.85%
• 10Y*: —

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

MYFRX vs. GIYIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
MYFRX Pioneer Multi-Asset Ultrashort Income Fund	1.62%	4.68%	6.25%	6.32%	0.26%	1.56%	-0.51%	3.34%	-0.09%
GIYIX Guggenheim Ultra Short Duration Fund	1.63%	5.20%	7.04%	6.81%	-1.19%	0.17%	1.78%	2.45%	0.16%

Correlation

The correlation between MYFRX and GIYIX is 0.35, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.35
Correlation (3Y) Calculated over the trailing 3-year period	0.33
Correlation (5Y) Calculated over the trailing 5-year period	0.32
Correlation (All Time) Calculated using the full available price history since Dec 3, 2018	0.33

Return for Risk

MYFRX vs. GIYIX — Risk / Return Rank

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

MYFRX

MYFRX Risk / Return Rank: 98
MYFRX Sharpe Ratio Rank: 93
MYFRX Sortino Ratio Rank: 99
MYFRX Omega Ratio Rank: 99
MYFRX Calmar Ratio Rank: 99
MYFRX Martin Ratio Rank: 99

GIYIX

GIYIX Risk / Return Rank: 99
GIYIX Sharpe Ratio Rank: 97
GIYIX Sortino Ratio Rank: 99
GIYIX Omega Ratio Rank: 99
GIYIX Calmar Ratio Rank: 99
GIYIX Martin Ratio Rank: 99

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.

MYFRX vs. GIYIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pioneer Multi-Asset Ultrashort Income Fund (MYFRX) and Guggenheim Ultra Short Duration Fund (GIYIX). 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.

	MYFRX	GIYIX	Difference
Sharpe ratio: Return per unit of total volatility	2.94	3.31	-0.37
Sortino ratio: Return per unit of downside risk	9.79	10.10	-0.30
Omega ratio: Gain probability vs. loss probability	3.37	3.19	+0.18
Calmar ratio: Return relative to maximum drawdown	13.79	11.87	+1.92
Martin ratio: Return relative to average drawdown	50.58	58.60	-8.02

MYFRX vs. GIYIX - Sharpe Ratio Comparison

The current MYFRX Sharpe Ratio is 2.94, which is comparable to the GIYIX Sharpe Ratio of 3.31. The chart below compares the historical Sharpe Ratios of MYFRX and GIYIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MYFRX vs. GIYIX - Drawdown Comparison

The maximum MYFRX drawdown since its inception was -10.08%, which is greater than GIYIX's maximum drawdown of -3.50%. Use the drawdown chart below to compare losses from any high point for MYFRX and GIYIX.

Drawdown Indicators

	MYFRX	GIYIX	Difference
Max Drawdown Largest peak-to-trough decline	-10.08%	-3.50%	-6.58%
Max Drawdown (1Y) Largest decline over 1 year	-0.31%	-0.40%	+0.09%
Max Drawdown (3Y) Largest decline over 3 years	-0.73%	-0.40%	-0.33%
Max Drawdown (5Y) Largest decline over 5 years	-1.52%	-3.15%	+1.63%
Max Drawdown (10Y) Largest decline over 10 years	-10.08%	—	—
Current Drawdown Current decline from peak	-0.10%	0.00%	-0.10%
Average Drawdown Average peak-to-trough decline	-0.26%	-0.35%	+0.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.08%	0.08%	0.00%

Volatility

MYFRX vs. GIYIX - Volatility Comparison

Pioneer Multi-Asset Ultrashort Income Fund (MYFRX) has a higher volatility of 0.42% compared to Guggenheim Ultra Short Duration Fund (GIYIX) at 0.38%. This indicates that MYFRX's price experiences larger fluctuations and is considered to be riskier than GIYIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MYFRX	GIYIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.42%	0.38%	+0.04%
Volatility (6M) Calculated over the trailing 6-month period	0.97%	0.96%	+0.01%
Volatility (1Y) Calculated over the trailing 1-year period	1.46%	1.42%	+0.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.61%	1.52%	+0.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.84%	1.43%	+0.41%

MYFRX vs. GIYIX - Expense Ratio Comparison

MYFRX has a 0.44% expense ratio, which is higher than GIYIX's 0.34% expense ratio.

Dividends

MYFRX vs. GIYIX - Dividend Comparison

MYFRX's dividend yield for the trailing twelve months is around 4.69%, more than GIYIX's 4.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GIYIX Guggenheim Ultra Short Duration Fund	4.36%	4.35%	5.15%	4.38%	1.67%	0.78%	1.45%	2.52%	0.56%	0.00%	0.00%	0.00%
MYFRX Pioneer Multi-Asset Ultrashort Income Fund	4.69%	4.99%	5.63%	4.74%	2.35%	1.34%	1.92%	2.98%	2.60%	1.88%	1.77%	1.36%

Frequently Asked Questions

Can I hold both MYFRX and GIYIX in my portfolio?

MYFRX and GIYIX have a correlation of 0.35, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MYFRX or GIYIX?

MYFRX has higher volatility (0.42%) compared to GIYIX (0.38%). In terms of maximum drawdown, MYFRX dropped -10.08% vs GIYIX's -3.50%.

Which has better risk-adjusted returns?

GIYIX currently has the higher Sharpe Ratio (3.31 vs 2.94), 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.