VTIPX vs. MEDIX

Last updated Jun 4, 2026

VTIPX (Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares) and MEDIX (MFS Emerging Markets Debt Fund) are both mutual funds - VTIPX is a Inflation-Protected Bonds fund managed by Vanguard, while MEDIX is a Emerging Markets Bonds fund managed by MFS. Over the past 10 years, VTIPX returned 3.05%/yr vs 3.73%/yr for MEDIX. At a 0.30 correlation, their price movements are largely independent. VTIPX charges 0.14%/yr vs 0.81%/yr for MEDIX.

Performance

VTIPX vs. MEDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares (VTIPX) 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, VTIPX achieves a 1.99% return, which is significantly lower than MEDIX's 2.46% return. Over the past 10 years, VTIPX has underperformed MEDIX with an annualized return of 3.05%, while MEDIX has yielded a comparatively higher 3.73% annualized return.

VTIPX

• 1D: 0.00%
• 1M: -0.00%
• YTD: 1.99%
• 6M: 1.96%
• 1Y: 4.60%
• 3Y*: 5.15%
• 5Y*: 3.29%
• 10Y*: 3.05%

MEDIX

• 1D: 0.16%
• 1M: 1.09%
• YTD: 2.46%
• 6M: 3.09%
• 1Y: 12.40%
• 3Y*: 9.48%
• 5Y*: 2.13%
• 10Y*: 3.73%

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

VTIPX vs. MEDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VTIPX Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares	1.99%	5.96%	4.65%	4.51%	-2.93%	5.21%	4.85%	4.74%	0.49%	0.72%
MEDIX MFS Emerging Markets Debt Fund	2.46%	12.48%	5.92%	9.42%	-15.97%	-2.40%	8.01%	14.12%	-4.99%	9.64%

Correlation

The correlation between VTIPX and MEDIX is 0.15, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.15
Correlation (3Y) Calculated over the trailing 3-year period	0.39
Correlation (5Y) Calculated over the trailing 5-year period	0.34
Correlation (10Y) Calculated over the trailing 10-year period	0.30
Correlation (All Time) Calculated using the full available price history since Jan 3, 2013	0.30

The correlation between VTIPX and MEDIX shifts across timeframes, from 0.15 (1 year) to 0.39 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

VTIPX vs. MEDIX — Risk / Return Rank

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

VTIPX

VTIPX Risk / Return Rank: 93
VTIPX Sharpe Ratio Rank: 90
VTIPX Sortino Ratio Rank: 95
VTIPX Omega Ratio Rank: 89
VTIPX Calmar Ratio Rank: 96
VTIPX Martin Ratio Rank: 96

MEDIX

MEDIX Risk / Return Rank: 84
MEDIX Sharpe Ratio Rank: 94
MEDIX Sortino Ratio Rank: 96
MEDIX Omega Ratio Rank: 93
MEDIX Calmar Ratio Rank: 65
MEDIX Martin Ratio Rank: 70

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.

VTIPX vs. MEDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares (VTIPX) 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.

	VTIPX	MEDIX	Difference
Sharpe ratio: Return per unit of total volatility	2.97	3.25	-0.28
Sortino ratio: Return per unit of downside risk	4.98	5.40	-0.42
Omega ratio: Gain probability vs. loss probability	1.62	1.70	-0.07
Calmar ratio: Return relative to maximum drawdown	6.27	3.09	+3.17
Martin ratio: Return relative to average drawdown	24.45	13.52	+10.93
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VTIPX vs. MEDIX - Sharpe Ratio Comparison

The current VTIPX Sharpe Ratio is 2.97, which is comparable to the MEDIX Sharpe Ratio of 3.25. The chart below compares the historical Sharpe Ratios of VTIPX 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

	VTIPX	MEDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.97	3.25	-0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.24	0.36	+0.88
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.38	0.64	+0.74
Sharpe Ratio (All Time) Calculated using the full available price history	1.03	0.98	+0.06

Drawdowns

VTIPX vs. MEDIX - Drawdown Comparison

The maximum VTIPX drawdown since its inception was -5.36%, smaller than the maximum MEDIX drawdown of -35.31%. Use the drawdown chart below to compare losses from any high point for VTIPX and MEDIX.

Drawdown Indicators

	VTIPX	MEDIX	Difference
Max Drawdown Largest peak-to-trough decline	-5.36%	-35.31%	+29.95%
Max Drawdown (1Y) Largest decline over 1 year	-0.72%	-4.12%	+3.40%
Max Drawdown (3Y) Largest decline over 3 years	-0.95%	-7.48%	+6.53%
Max Drawdown (5Y) Largest decline over 5 years	-5.36%	-27.40%	+22.04%
Max Drawdown (10Y) Largest decline over 10 years	-5.36%	-27.40%	+22.04%
Current Drawdown Current decline from peak	-0.04%	0.00%	-0.04%
Average Drawdown Average peak-to-trough decline	-1.11%	-4.44%	+3.33%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.18%	0.94%	-0.76%

Volatility

VTIPX vs. MEDIX - Volatility Comparison

The current volatility for Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares (VTIPX) is 0.53%, while MFS Emerging Markets Debt Fund (MEDIX) has a volatility of 1.39%. This indicates that VTIPX experiences smaller price fluctuations and is considered to be less risky than MEDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VTIPX	MEDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.53%	1.39%	-0.86%
Volatility (6M) Calculated over the trailing 6-month period	1.09%	3.22%	-2.13%
Volatility (1Y) Calculated over the trailing 1-year period	1.51%	3.92%	-2.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.66%	5.89%	-3.23%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.22%	5.87%	-3.65%

VTIPX vs. MEDIX - Expense Ratio Comparison

VTIPX has a 0.14% expense ratio, which is lower than MEDIX's 0.81% expense ratio.

Dividends

VTIPX vs. MEDIX - Dividend Comparison

VTIPX's dividend yield for the trailing twelve months is around 3.48%, less than MEDIX's 5.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MEDIX MFS Emerging Markets Debt Fund	5.04%	5.22%	5.68%	4.90%	5.51%	4.33%	4.07%	4.59%	4.87%	4.46%	4.86%	5.25%
VTIPX Vanguard Short-Term Inflation-Protected Securities Index Fund Investor Shares	3.48%	3.70%	2.60%	2.76%	6.74%	4.59%	1.11%	1.88%	2.37%	1.50%	0.55%	0.00%

Frequently Asked Questions

Can I hold both VTIPX and MEDIX in my portfolio?

VTIPX and MEDIX have a correlation of 0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VTIPX or MEDIX?

MEDIX has higher volatility (1.39%) compared to VTIPX (0.53%). In terms of maximum drawdown, VTIPX dropped -5.36% vs MEDIX's -35.31%.

Which has better risk-adjusted returns?

MEDIX currently has the higher Sharpe Ratio (3.25 vs 2.97), 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.