VEGBX vs. MEDIX

Last updated Jun 5, 2026

VEGBX (Vanguard Emerging Markets Bond Fund Admiral Shares) and MEDIX (MFS Emerging Markets Debt Fund) are both Emerging Markets Bonds funds. Over the past 5 years, VEGBX returned 4.37%/yr vs 2.07%/yr for MEDIX. Their correlation of 0.89 suggests significant overlap in exposure. VEGBX charges 0.40%/yr vs 0.81%/yr for MEDIX.

Performance

VEGBX vs. MEDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Emerging Markets Bond Fund Admiral Shares (VEGBX) and MFS Emerging Markets Debt Fund (MEDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VEGBX achieves a 2.57% return, which is significantly higher than MEDIX's 2.30% return.

VEGBX

• 1D: -0.28%
• 1M: 0.68%
• YTD: 2.57%
• 6M: 3.27%
• 1Y: 12.73%
• 3Y*: 11.76%
• 5Y*: 4.37%
• 10Y*: —

MEDIX

• 1D: -0.16%
• 1M: 0.69%
• YTD: 2.30%
• 6M: 3.01%
• 1Y: 11.76%
• 3Y*: 9.42%
• 5Y*: 2.07%
• 10Y*: 3.71%

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

VEGBX vs. MEDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VEGBX Vanguard Emerging Markets Bond Fund Admiral Shares	2.57%	14.46%	7.60%	13.81%	-13.02%	-1.44%	15.18%	17.87%	-0.66%	11.65%
MEDIX MFS Emerging Markets Debt Fund	2.30%	12.48%	5.92%	9.42%	-15.97%	-2.40%	8.01%	14.12%	-4.99%	8.04%

Correlation

The correlation between VEGBX and MEDIX is 0.89, 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	0.89
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (All Time) Calculated using the full available price history since Feb 2, 2017	0.89

The correlation between VEGBX and MEDIX has been stable across timeframes, ranging from 0.89 to 0.90 - a consistent structural relationship.

Return for Risk

VEGBX vs. MEDIX — Risk / Return Rank

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

VEGBX

VEGBX Risk / Return Rank: 87
VEGBX Sharpe Ratio Rank: 91
VEGBX Sortino Ratio Rank: 94
VEGBX Omega Ratio Rank: 88
VEGBX Calmar Ratio Rank: 78
VEGBX Martin Ratio Rank: 83

MEDIX

MEDIX Risk / Return Rank: 81
MEDIX Sharpe Ratio Rank: 92
MEDIX Sortino Ratio Rank: 95
MEDIX Omega Ratio Rank: 90
MEDIX Calmar Ratio Rank: 61
MEDIX Martin Ratio Rank: 68

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.

VEGBX vs. MEDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Emerging Markets Bond Fund Admiral Shares (VEGBX) and MFS Emerging Markets Debt Fund (MEDIX). 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.

	VEGBX	MEDIX	Difference
Sharpe ratio: Return per unit of total volatility	3.06	3.13	-0.07
Sortino ratio: Return per unit of downside risk	4.94	5.21	-0.27
Omega ratio: Gain probability vs. loss probability	1.63	1.67	-0.04
Calmar ratio: Return relative to maximum drawdown	3.54	2.98	+0.56
Martin ratio: Return relative to average drawdown	15.48	13.03	+2.45
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VEGBX vs. MEDIX - Sharpe Ratio Comparison

The current VEGBX Sharpe Ratio is 3.06, which is comparable to the MEDIX Sharpe Ratio of 3.13. The chart below compares the historical Sharpe Ratios of VEGBX and MEDIX, 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

	VEGBX	MEDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.06	3.13	-0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.69	0.35	+0.34
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.63	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.08	0.97	+0.11

Drawdowns

VEGBX vs. MEDIX - Drawdown Comparison

The maximum VEGBX drawdown since its inception was -24.27%, smaller than the maximum MEDIX drawdown of -35.31%. Use the drawdown chart below to compare losses from any high point for VEGBX and MEDIX.

Drawdown Indicators

	VEGBX	MEDIX	Difference
Max Drawdown Largest peak-to-trough decline	-24.27%	-35.31%	+11.04%
Max Drawdown (1Y) Largest decline over 1 year	-3.79%	-4.12%	+0.33%
Max Drawdown (3Y) Largest decline over 3 years	-5.53%	-7.48%	+1.95%
Max Drawdown (5Y) Largest decline over 5 years	-24.27%	-27.40%	+3.13%
Max Drawdown (10Y) Largest decline over 10 years	—	-27.40%	—
Current Drawdown Current decline from peak	-0.28%	-0.16%	-0.12%
Average Drawdown Average peak-to-trough decline	-3.84%	-4.44%	+0.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.86%	0.94%	-0.08%

Volatility

VEGBX vs. MEDIX - Volatility Comparison

Vanguard Emerging Markets Bond Fund Admiral Shares (VEGBX) has a higher volatility of 1.52% compared to MFS Emerging Markets Debt Fund (MEDIX) at 1.36%. This indicates that VEGBX's price experiences larger fluctuations and is considered to be riskier than MEDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VEGBX	MEDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.52%	1.36%	+0.16%
Volatility (6M) Calculated over the trailing 6-month period	3.59%	3.22%	+0.37%
Volatility (1Y) Calculated over the trailing 1-year period	4.39%	3.92%	+0.47%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.34%	5.89%	+0.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.36%	5.87%	+0.49%

VEGBX vs. MEDIX - Expense Ratio Comparison

VEGBX has a 0.40% expense ratio, which is lower than MEDIX's 0.81% expense ratio.

Dividends

VEGBX vs. MEDIX - Dividend Comparison

VEGBX's dividend yield for the trailing twelve months is around 6.17%, more than MEDIX's 5.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MEDIX MFS Emerging Markets Debt Fund	5.05%	5.22%	5.68%	4.90%	5.51%	4.33%	4.07%	4.59%	4.87%	4.46%	4.86%	5.25%
VEGBX Vanguard Emerging Markets Bond Fund Admiral Shares	6.17%	6.34%	7.02%	7.20%	5.61%	5.14%	4.62%	6.42%	5.00%	0.39%	0.00%	0.00%

Frequently Asked Questions

Can I hold both VEGBX and MEDIX in my portfolio?

VEGBX and MEDIX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VEGBX or MEDIX?

VEGBX has higher volatility (1.52%) compared to MEDIX (1.36%). In terms of maximum drawdown, VEGBX dropped -24.27% vs MEDIX's -35.31%.

Which has better risk-adjusted returns?

MEDIX currently has the higher Sharpe Ratio (3.13 vs 3.06), 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.