AHYB vs. MID

Last updated Jun 5, 2026

AHYB (American Century Select High Yield ETF) and MID (American Century Mid Cap Growth Impact ETF) are both exchange-traded funds - AHYB is a High Yield Bonds fund tracking the ICE BofA US High Yield Constrained (BB), while MID is a Mid Cap Growth Equities fund actively managed by American Century. AHYB is passively managed, while MID is actively managed. Over the past 3 years, AHYB returned 8.04%/yr vs 14.75%/yr for MID. A 0.68 correlation means they provide meaningful diversification when combined. Both charge a 0.45% expense ratio.

Performance

AHYB vs. MID - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Select High Yield ETF (AHYB) and American Century Mid Cap Growth Impact ETF (MID). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AHYB achieves a 1.31% return, which is significantly lower than MID's 6.22% return.

AHYB

• 1D: 0.18%
• 1M: 0.40%
• YTD: 1.31%
• 6M: 2.00%
• 1Y: 6.50%
• 3Y*: 8.04%
• 5Y*: —
• 10Y*: —

MID

• 1D: 0.71%
• 1M: 4.09%
• YTD: 6.22%
• 6M: 2.98%
• 1Y: 7.13%
• 3Y*: 14.75%
• 5Y*: 6.40%
• 10Y*: —

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

AHYB vs. MID - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
AHYB American Century Select High Yield ETF	1.31%	8.96%	6.32%	11.69%	-10.26%	0.84%
MID American Century Mid Cap Growth Impact ETF	6.22%	8.22%	19.40%	22.20%	-27.44%	-7.29%

Correlation

The correlation between AHYB and MID is 0.61, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.63
Correlation (All Time) Calculated using the full available price history since Nov 19, 2021	0.68

The correlation between AHYB and MID has been stable across timeframes, ranging from 0.61 to 0.68 - a consistent structural relationship.

Return for Risk

AHYB vs. MID — Risk / Return Rank

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

AHYB

AHYB Risk / Return Rank: 62
AHYB Sharpe Ratio Rank: 59
AHYB Sortino Ratio Rank: 63
AHYB Omega Ratio Rank: 64
AHYB Calmar Ratio Rank: 56
AHYB Martin Ratio Rank: 69

MID

MID Risk / Return Rank: 16
MID Sharpe Ratio Rank: 16
MID Sortino Ratio Rank: 16
MID Omega Ratio Rank: 15
MID Calmar Ratio Rank: 16
MID Martin Ratio Rank: 17

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.

AHYB vs. MID - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Select High Yield ETF (AHYB) and American Century Mid Cap Growth Impact ETF (MID). 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.

	AHYB	MID	Difference
Sharpe ratio: Return per unit of total volatility	1.95	0.43	+1.52
Sortino ratio: Return per unit of downside risk	2.91	0.71	+2.19
Omega ratio: Gain probability vs. loss probability	1.38	1.08	+0.30
Calmar ratio: Return relative to maximum drawdown	2.71	0.52	+2.20
Martin ratio: Return relative to average drawdown	12.65	1.53	+11.12
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AHYB vs. MID - Sharpe Ratio Comparison

The current AHYB Sharpe Ratio is 1.95, which is higher than the MID Sharpe Ratio of 0.43. The chart below compares the historical Sharpe Ratios of AHYB and MID, 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

	AHYB	MID	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.95	0.43	+1.52
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.27	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.54	0.41	+0.13

Drawdowns

AHYB vs. MID - Drawdown Comparison

The maximum AHYB drawdown since its inception was -14.76%, smaller than the maximum MID drawdown of -40.15%. Use the drawdown chart below to compare losses from any high point for AHYB and MID.

Drawdown Indicators

	AHYB	MID	Difference
Max Drawdown Largest peak-to-trough decline	-14.76%	-40.15%	+25.39%
Max Drawdown (1Y) Largest decline over 1 year	-2.41%	-13.89%	+11.48%
Max Drawdown (3Y) Largest decline over 3 years	-3.89%	-23.92%	+20.03%
Max Drawdown (5Y) Largest decline over 5 years	—	-40.15%	—
Current Drawdown Current decline from peak	-0.13%	0.00%	-0.13%
Average Drawdown Average peak-to-trough decline	-3.46%	-13.43%	+9.97%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.52%	4.66%	-4.14%

Volatility

AHYB vs. MID - Volatility Comparison

The current volatility for American Century Select High Yield ETF (AHYB) is 1.05%, while American Century Mid Cap Growth Impact ETF (MID) has a volatility of 4.90%. This indicates that AHYB experiences smaller price fluctuations and is considered to be less risky than MID based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AHYB	MID	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.05%	4.90%	-3.85%
Volatility (6M) Calculated over the trailing 6-month period	2.57%	13.02%	-10.45%
Volatility (1Y) Calculated over the trailing 1-year period	3.36%	16.69%	-13.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.14%	23.62%	-16.48%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.14%	23.91%	-16.77%

AHYB vs. MID - Expense Ratio Comparison

Both AHYB and MID have an expense ratio of 0.45%.

Dividends

AHYB vs. MID - Dividend Comparison

AHYB's dividend yield for the trailing twelve months is around 6.00%, more than MID's 0.15% yield.

Position	TTM	2025	2024	2023	2022	2021
AHYB American Century Select High Yield ETF	6.00%	5.80%	5.87%	5.28%	5.06%	0.60%
MID American Century Mid Cap Growth Impact ETF	0.15%	0.18%	0.17%	0.02%	0.00%	0.00%

Frequently Asked Questions

Can I hold both AHYB and MID in my portfolio?

AHYB and MID have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AHYB or MID?

MID has higher volatility (4.90%) compared to AHYB (1.05%). In terms of maximum drawdown, AHYB dropped -14.76% vs MID's -40.15%.

Which ETF is better, AHYB or MID?

On 3-year performance, MID leads with 14.75% vs 8.04% for AHYB. Both ETFs have the same 0.45% expense ratio. On volatility, AHYB has been the lower-risk option at 1.05%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, AHYB or MID?

Over the 3-year period, MID has performed better with a 14.75% return vs 8.04%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, AHYB or MID?

AHYB and MID have the same expense ratio: 0.45% per year.

Which ETF pays a higher dividend yield, AHYB or MID?

AHYB has the higher dividend yield at 6.00%, compared with 0.15% for MID.

What is the main difference between AHYB and MID?

AHYB is categorized as High Yield Bonds, while MID is Mid Cap Growth Equities.

Which has better risk-adjusted returns?

AHYB currently has the higher Sharpe Ratio (1.95 vs 0.43), 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.