SHOYX vs. ACHFX

Last updated Jun 5, 2026

SHOYX (American Beacon SiM High Yield Opportunities Fund Class Y) and ACHFX (American Century High Income Fund Class G) are both High Yield Bonds funds. Both are actively managed. Over the past 3 years, SHOYX returned 8.98%/yr vs 9.03%/yr for ACHFX. Their correlation of 0.86 suggests significant overlap in exposure.

Performance

SHOYX vs. ACHFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Beacon SiM High Yield Opportunities Fund Class Y (SHOYX) and American Century High Income Fund Class G (ACHFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SHOYX achieves a 2.06% return, which is significantly higher than ACHFX's 1.44% return.

SHOYX

• 1D: -0.21%
• 1M: -0.15%
• YTD: 2.06%
• 6M: 2.65%
• 1Y: 9.66%
• 3Y*: 8.98%
• 5Y*: 4.90%
• 10Y*: 6.30%

ACHFX

• 1D: -0.23%
• 1M: 0.15%
• YTD: 1.44%
• 6M: 2.18%
• 1Y: 7.82%
• 3Y*: 9.03%
• 5Y*: —
• 10Y*: —

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

SHOYX vs. ACHFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
SHOYX American Beacon SiM High Yield Opportunities Fund Class Y	2.06%	9.52%	8.69%	11.30%	-0.53%
ACHFX American Century High Income Fund Class G	1.44%	9.62%	8.18%	12.56%	-1.92%

Correlation

The correlation between SHOYX and ACHFX is 0.82, 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	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (All Time) Calculated using the full available price history since May 24, 2022	0.86

The correlation between SHOYX and ACHFX has been stable across timeframes, ranging from 0.82 to 0.86 - a consistent structural relationship.

Return for Risk

SHOYX vs. ACHFX — Risk / Return Rank

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

SHOYX

SHOYX Risk / Return Rank: 96
SHOYX Sharpe Ratio Rank: 96
SHOYX Sortino Ratio Rank: 98
SHOYX Omega Ratio Rank: 97
SHOYX Calmar Ratio Rank: 93
SHOYX Martin Ratio Rank: 97

ACHFX

ACHFX Risk / Return Rank: 80
ACHFX Sharpe Ratio Rank: 69
ACHFX Sortino Ratio Rank: 87
ACHFX Omega Ratio Rank: 84
ACHFX Calmar Ratio Rank: 74
ACHFX Martin Ratio Rank: 88

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.

SHOYX vs. ACHFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Beacon SiM High Yield Opportunities Fund Class Y (SHOYX) and American Century High Income Fund Class G (ACHFX). 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.

	SHOYX	ACHFX	Difference
Sharpe ratio: Return per unit of total volatility	3.48	2.36	+1.12
Sortino ratio: Return per unit of downside risk	6.46	4.17	+2.28
Omega ratio: Gain probability vs. loss probability	1.90	1.56	+0.34
Calmar ratio: Return relative to maximum drawdown	4.98	3.23	+1.75
Martin ratio: Return relative to average drawdown	25.57	16.48	+9.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SHOYX vs. ACHFX - Sharpe Ratio Comparison

The current SHOYX Sharpe Ratio is 3.48, which is higher than the ACHFX Sharpe Ratio of 2.36. The chart below compares the historical Sharpe Ratios of SHOYX and ACHFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	SHOYX	ACHFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.48	2.36	+1.12
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.14	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.24	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.40	1.34	+0.06

Drawdowns

SHOYX vs. ACHFX - Drawdown Comparison

The maximum SHOYX drawdown since its inception was -24.66%, which is greater than ACHFX's maximum drawdown of -9.27%. Use the drawdown chart below to compare losses from any high point for SHOYX and ACHFX.

Drawdown Indicators

	SHOYX	ACHFX	Difference
Max Drawdown Largest peak-to-trough decline	-24.66%	-9.27%	-15.39%
Max Drawdown (1Y) Largest decline over 1 year	-2.00%	-2.51%	+0.51%
Max Drawdown (3Y) Largest decline over 3 years	-3.67%	-3.89%	+0.22%
Max Drawdown (5Y) Largest decline over 5 years	-12.31%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-24.66%	—	—
Current Drawdown Current decline from peak	-0.32%	-0.23%	-0.09%
Average Drawdown Average peak-to-trough decline	-1.88%	-1.42%	-0.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.39%	0.49%	-0.10%

Volatility

SHOYX vs. ACHFX - Volatility Comparison

The current volatility for American Beacon SiM High Yield Opportunities Fund Class Y (SHOYX) is 0.80%, while American Century High Income Fund Class G (ACHFX) has a volatility of 1.14%. This indicates that SHOYX experiences smaller price fluctuations and is considered to be less risky than ACHFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SHOYX	ACHFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.80%	1.14%	-0.34%
Volatility (6M) Calculated over the trailing 6-month period	2.08%	2.63%	-0.55%
Volatility (1Y) Calculated over the trailing 1-year period	2.85%	3.43%	-0.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.32%	5.50%	-1.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.12%	5.50%	-0.38%

Dividends

SHOYX vs. ACHFX - Dividend Comparison

SHOYX's dividend yield for the trailing twelve months is around 6.29%, less than ACHFX's 7.34% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACHFX American Century High Income Fund Class G	7.34%	7.25%	7.24%	5.24%	2.57%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SHOYX American Beacon SiM High Yield Opportunities Fund Class Y	6.29%	6.97%	5.67%	5.62%	4.38%	5.43%	6.30%	6.17%	6.36%	5.79%	6.63%	5.19%

Frequently Asked Questions

Can I hold both SHOYX and ACHFX in my portfolio?

SHOYX and ACHFX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SHOYX or ACHFX?

ACHFX has higher volatility (1.14%) compared to SHOYX (0.80%). In terms of maximum drawdown, SHOYX dropped -24.66% vs ACHFX's -9.27%.

Which has better risk-adjusted returns?

SHOYX currently has the higher Sharpe Ratio (3.48 vs 2.36), 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.