AGBVX vs. VTIIX

Last updated Jun 24, 2026

AGBVX (American Century Global Bond Fund) and VTIIX (Vanguard Total International Bond II Index Fund Investor Class) are both Global Bonds funds. Over the past 5 years, AGBVX returned 0.14%/yr vs 0.37%/yr for VTIIX. Their correlation of 0.87 suggests significant overlap in exposure. AGBVX charges 0.80%/yr vs 0.11%/yr for VTIIX.

Performance

AGBVX vs. VTIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Global Bond Fund (AGBVX) and Vanguard Total International Bond II Index Fund Investor Class (VTIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AGBVX achieves a 1.01% return, which is significantly higher than VTIIX's 0.90% return.

AGBVX

• 1D: -0.23%
• 1M: 0.75%
• YTD: 1.01%
• 6M: 1.13%
• 1Y: 3.52%
• 3Y*: 3.95%
• 5Y*: 0.14%
• 10Y*: 1.48%

VTIIX

• 1D: -0.23%
• 1M: 0.81%
• YTD: 0.90%
• 6M: 1.01%
• 1Y: 2.12%
• 3Y*: 4.19%
• 5Y*: 0.37%
• 10Y*: —

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

AGBVX vs. VTIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
AGBVX American Century Global Bond Fund	1.01%	4.86%	2.26%	6.58%	-12.84%	0.47%
VTIIX Vanguard Total International Bond II Index Fund Investor Class	0.90%	2.95%	3.82%	8.72%	-13.03%	-0.52%

Correlation

The correlation between AGBVX and VTIIX 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	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (All Time) Calculated using the full available price history since Mar 2, 2021	0.87

The correlation between AGBVX and VTIIX has been stable across timeframes, ranging from 0.82 to 0.87 - a consistent structural relationship.

Return for Risk

AGBVX vs. VTIIX — Risk / Return Rank

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

AGBVX

AGBVX Risk / Return Rank: 22
AGBVX Sharpe Ratio Rank: 24
AGBVX Sortino Ratio Rank: 24
AGBVX Omega Ratio Rank: 24
AGBVX Calmar Ratio Rank: 17
AGBVX Martin Ratio Rank: 20

VTIIX

VTIIX Risk / Return Rank: 8
VTIIX Sharpe Ratio Rank: 9
VTIIX Sortino Ratio Rank: 8
VTIIX Omega Ratio Rank: 8
VTIIX Calmar Ratio Rank: 8
VTIIX Martin Ratio Rank: 8

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.

AGBVX vs. VTIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Global Bond Fund (AGBVX) and Vanguard Total International Bond II Index Fund Investor Class (VTIIX). 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.

	AGBVX	VTIIX	Difference
Sharpe ratio: Return per unit of total volatility	1.28	0.67	+0.61
Sortino ratio: Return per unit of downside risk	1.87	0.98	+0.89
Omega ratio: Gain probability vs. loss probability	1.24	1.12	+0.12
Calmar ratio: Return relative to maximum drawdown	1.39	0.72	+0.67
Martin ratio: Return relative to average drawdown	4.69	1.96	+2.73

AGBVX vs. VTIIX - Sharpe Ratio Comparison

The current AGBVX Sharpe Ratio is 1.28, which is higher than the VTIIX Sharpe Ratio of 0.67. The chart below compares the historical Sharpe Ratios of AGBVX and VTIIX, 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

AGBVX vs. VTIIX - Drawdown Comparison

The maximum AGBVX drawdown since its inception was -16.32%, roughly equal to the maximum VTIIX drawdown of -15.95%. Use the drawdown chart below to compare losses from any high point for AGBVX and VTIIX.

Drawdown Indicators

	AGBVX	VTIIX	Difference
Max Drawdown Largest peak-to-trough decline	-16.32%	-15.95%	-0.37%
Max Drawdown (1Y) Largest decline over 1 year	-2.71%	-2.94%	+0.23%
Max Drawdown (3Y) Largest decline over 3 years	-4.78%	-2.94%	-1.84%
Max Drawdown (5Y) Largest decline over 5 years	-16.32%	-15.95%	-0.37%
Max Drawdown (10Y) Largest decline over 10 years	-16.32%	—	—
Current Drawdown Current decline from peak	-0.82%	-1.02%	+0.20%
Average Drawdown Average peak-to-trough decline	-3.31%	-6.00%	+2.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.80%	1.08%	-0.28%

Volatility

AGBVX vs. VTIIX - Volatility Comparison

The current volatility for American Century Global Bond Fund (AGBVX) is 0.89%, while Vanguard Total International Bond II Index Fund Investor Class (VTIIX) has a volatility of 0.95%. This indicates that AGBVX experiences smaller price fluctuations and is considered to be less risky than VTIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AGBVX	VTIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.89%	0.95%	-0.06%
Volatility (6M) Calculated over the trailing 6-month period	2.40%	2.73%	-0.33%
Volatility (1Y) Calculated over the trailing 1-year period	2.96%	3.20%	-0.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.42%	4.54%	-0.12%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.72%	4.43%	-0.71%

AGBVX vs. VTIIX - Expense Ratio Comparison

AGBVX has a 0.80% expense ratio, which is higher than VTIIX's 0.11% expense ratio.

Dividends

AGBVX vs. VTIIX - Dividend Comparison

AGBVX's dividend yield for the trailing twelve months is around 5.25%, more than VTIIX's 4.29% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AGBVX American Century Global Bond Fund	5.25%	4.68%	2.71%	1.88%	7.39%	2.15%	0.90%	1.72%	6.01%	1.91%	1.43%	0.44%
VTIIX Vanguard Total International Bond II Index Fund Investor Class	4.29%	4.21%	4.46%	4.16%	0.89%	0.58%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both AGBVX and VTIIX in my portfolio?

AGBVX and VTIIX 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, AGBVX or VTIIX?

VTIIX has higher volatility (0.95%) compared to AGBVX (0.89%). In terms of maximum drawdown, AGBVX dropped -16.32% vs VTIIX's -15.95%.

Which has better risk-adjusted returns?

AGBVX currently has the higher Sharpe Ratio (1.28 vs 0.67), 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.