XFLX vs. MUSI

Last updated Jun 26, 2026

XFLX (FundX Flexible ETF) and MUSI (American Century Multisector Income ETF) are both Multisector Bonds funds. Both are actively managed. Over the past year, XFLX returned 4.44% vs 5.38% for MUSI. A 0.73 correlation means they provide meaningful diversification when combined. XFLX charges 1.17%/yr vs 0.36%/yr for MUSI.

Performance

XFLX vs. MUSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FundX Flexible ETF (XFLX) and American Century Multisector Income ETF (MUSI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, XFLX achieves a 1.39% return, which is significantly higher than MUSI's 1.30% return.

XFLX

• 1D: 0.11%
• 1M: 0.29%
• YTD: 1.39%
• 6M: 1.09%
• 1Y: 4.44%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MUSI

• 1D: 0.09%
• 1M: 0.79%
• YTD: 1.30%
• 6M: 1.21%
• 1Y: 5.38%
• 3Y*: 6.62%
• 5Y*: —
• 10Y*: —

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

XFLX vs. MUSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
XFLX FundX Flexible ETF	1.39%	2.56%	4.01%	3.90%
MUSI American Century Multisector Income ETF	1.30%	8.32%	5.14%	7.22%

Correlation

The correlation between XFLX and MUSI is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (All Time) Calculated using the full available price history since Oct 9, 2023	0.73

The correlation between XFLX and MUSI shifts across timeframes, from 0.73 (all time) to 0.84 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

XFLX vs. MUSI — Risk / Return Rank

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

XFLX

XFLX Risk / Return Rank: 37
XFLX Sharpe Ratio Rank: 37
XFLX Sortino Ratio Rank: 37
XFLX Omega Ratio Rank: 38
XFLX Calmar Ratio Rank: 31
XFLX Martin Ratio Rank: 40

MUSI

MUSI Risk / Return Rank: 50
MUSI Sharpe Ratio Rank: 53
MUSI Sortino Ratio Rank: 57
MUSI Omega Ratio Rank: 53
MUSI Calmar Ratio Rank: 44
MUSI Martin Ratio Rank: 45

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.

XFLX vs. MUSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FundX Flexible ETF (XFLX) and American Century Multisector Income ETF (MUSI). 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.

	XFLX	MUSI	Difference
Sharpe ratio: Return per unit of total volatility	1.23	1.61	-0.38
Sortino ratio: Return per unit of downside risk	1.80	2.40	-0.60
Omega ratio: Gain probability vs. loss probability	1.23	1.30	-0.06
Calmar ratio: Return relative to maximum drawdown	1.43	1.94	-0.51
Martin ratio: Return relative to average drawdown	5.83	6.68	-0.84

XFLX vs. MUSI - Sharpe Ratio Comparison

The current XFLX Sharpe Ratio is 1.23, which is comparable to the MUSI Sharpe Ratio of 1.61. The chart below compares the historical Sharpe Ratios of XFLX and MUSI, 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

XFLX vs. MUSI - Drawdown Comparison

The maximum XFLX drawdown since its inception was -6.54%, smaller than the maximum MUSI drawdown of -13.91%. Use the drawdown chart below to compare losses from any high point for XFLX and MUSI.

Drawdown Indicators

	XFLX	MUSI	Difference
Max Drawdown Largest peak-to-trough decline	-6.54%	-13.91%	+7.37%
Max Drawdown (1Y) Largest decline over 1 year	-3.11%	-2.78%	-0.33%
Max Drawdown (3Y) Largest decline over 3 years	—	-4.16%	—
Current Drawdown Current decline from peak	-0.23%	-0.45%	+0.22%
Average Drawdown Average peak-to-trough decline	-0.93%	-4.18%	+3.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.76%	0.81%	-0.05%

Volatility

XFLX vs. MUSI - Volatility Comparison

FundX Flexible ETF (XFLX) and American Century Multisector Income ETF (MUSI) have volatilities of 1.03% and 1.08%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	XFLX	MUSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.03%	1.08%	-0.05%
Volatility (6M) Calculated over the trailing 6-month period	3.10%	2.73%	+0.37%
Volatility (1Y) Calculated over the trailing 1-year period	3.63%	3.37%	+0.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.68%	4.84%	-0.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.68%	4.84%	-0.16%

XFLX vs. MUSI - Expense Ratio Comparison

XFLX has a 1.17% expense ratio, which is higher than MUSI's 0.36% expense ratio.

Dividends

XFLX vs. MUSI - Dividend Comparison

XFLX's dividend yield for the trailing twelve months is around 9.66%, more than MUSI's 5.50% yield.

Position	TTM	2025	2024	2023	2022	2021
MUSI American Century Multisector Income ETF	5.50%	5.74%	6.00%	5.20%	4.02%	1.62%
XFLX FundX Flexible ETF	9.66%	9.80%	4.55%	4.05%	0.00%	0.00%

Frequently Asked Questions

Can I hold both XFLX and MUSI in my portfolio?

XFLX and MUSI have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, XFLX or MUSI?

MUSI has higher volatility (1.08%) compared to XFLX (1.03%). In terms of maximum drawdown, XFLX dropped -6.54% vs MUSI's -13.91%.

Which ETF is better, XFLX or MUSI?

On 1-year performance, MUSI leads with 5.38% vs 4.44% for XFLX. On fees, MUSI is cheaper at 0.36% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, XFLX or MUSI?

Over the 1-year period, MUSI has performed better with a 5.38% return vs 4.44%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, XFLX or MUSI?

MUSI is cheaper with a 0.36% expense ratio, compared with 1.17% for XFLX.

Which ETF pays a higher dividend yield, XFLX or MUSI?

XFLX has the higher dividend yield at 9.66%, compared with 5.50% for MUSI.

What is the main difference between XFLX and MUSI?

They also come from different issuers: FundX and American Century. Their fees differ too: 1.17% for XFLX and 0.36% for MUSI.

Which has better risk-adjusted returns?

MUSI currently has the higher Sharpe Ratio (1.61 vs 1.23), 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.