PRIDX vs. VSS

Last updated Jun 4, 2026

PRIDX (T. Rowe Price International Discovery Fund) and VSS (Vanguard FTSE All-World ex-US Small-Cap ETF) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, PRIDX returned 8.95%/yr vs 8.07%/yr for VSS. Their correlation of 0.91 suggests significant overlap in exposure. PRIDX charges 1.23%/yr vs 0.07%/yr for VSS.

Performance

PRIDX vs. VSS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price International Discovery Fund (PRIDX) and Vanguard FTSE All-World ex-US Small-Cap ETF (VSS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PRIDX achieves a 8.88% return, which is significantly lower than VSS's 10.57% return. Over the past 10 years, PRIDX has outperformed VSS with an annualized return of 8.95%, while VSS has yielded a comparatively lower 8.07% annualized return.

PRIDX

• 1D: 0.10%
• 1M: 2.24%
• YTD: 8.88%
• 6M: 12.45%
• 1Y: 22.58%
• 3Y*: 15.05%
• 5Y*: 2.14%
• 10Y*: 8.95%

VSS

• 1D: -1.12%
• 1M: 1.27%
• YTD: 10.57%
• 6M: 13.10%
• 1Y: 27.32%
• 3Y*: 16.67%
• 5Y*: 5.76%
• 10Y*: 8.07%

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

PRIDX vs. VSS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRIDX T. Rowe Price International Discovery Fund	8.88%	25.53%	3.65%	13.19%	-30.34%	7.31%	38.78%	25.01%	-17.54%	38.56%
VSS Vanguard FTSE All-World ex-US Small-Cap ETF	10.57%	29.61%	2.94%	15.52%	-21.48%	13.05%	11.81%	21.36%	-18.48%	30.61%

Correlation

The correlation between PRIDX and VSS is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Apr 7, 2009	0.91

The correlation between PRIDX and VSS has been stable across timeframes, ranging from 0.91 to 0.93 - a consistent structural relationship.

Return for Risk

PRIDX vs. VSS — Risk / Return Rank

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

PRIDX

PRIDX Risk / Return Rank: 26
PRIDX Sharpe Ratio Rank: 30
PRIDX Sortino Ratio Rank: 29
PRIDX Omega Ratio Rank: 30
PRIDX Calmar Ratio Rank: 20
PRIDX Martin Ratio Rank: 24

VSS

VSS Risk / Return Rank: 51
VSS Sharpe Ratio Rank: 53
VSS Sortino Ratio Rank: 51
VSS Omega Ratio Rank: 54
VSS Calmar Ratio Rank: 47
VSS Martin Ratio Rank: 53

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.

PRIDX vs. VSS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price International Discovery Fund (PRIDX) and Vanguard FTSE All-World ex-US Small-Cap ETF (VSS). 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.

	PRIDX	VSS	Difference
Sharpe ratio: Return per unit of total volatility	1.55	1.85	-0.30
Sortino ratio: Return per unit of downside risk	2.21	2.54	-0.33
Omega ratio: Gain probability vs. loss probability	1.29	1.34	-0.05
Calmar ratio: Return relative to maximum drawdown	1.63	2.36	-0.73
Martin ratio: Return relative to average drawdown	6.05	9.13	-3.08
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PRIDX vs. VSS - Sharpe Ratio Comparison

The current PRIDX Sharpe Ratio is 1.55, which is comparable to the VSS Sharpe Ratio of 1.85. The chart below compares the historical Sharpe Ratios of PRIDX and VSS, 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

	PRIDX	VSS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.55	1.85	-0.30
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.13	0.35	-0.22
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.54	0.47	+0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.64	0.55	+0.10

Drawdowns

PRIDX vs. VSS - Drawdown Comparison

The maximum PRIDX drawdown since its inception was -65.01%, which is greater than VSS's maximum drawdown of -43.51%. Use the drawdown chart below to compare losses from any high point for PRIDX and VSS.

Drawdown Indicators

	PRIDX	VSS	Difference
Max Drawdown Largest peak-to-trough decline	-65.01%	-43.51%	-21.50%
Max Drawdown (1Y) Largest decline over 1 year	-13.50%	-11.62%	-1.88%
Max Drawdown (3Y) Largest decline over 3 years	-15.86%	-15.73%	-0.13%
Max Drawdown (5Y) Largest decline over 5 years	-43.86%	-33.93%	-9.93%
Max Drawdown (10Y) Largest decline over 10 years	-43.86%	-43.51%	-0.35%
Current Drawdown Current decline from peak	-1.31%	-2.58%	+1.27%
Average Drawdown Average peak-to-trough decline	-16.36%	-9.64%	-6.72%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.63%	3.00%	+0.63%

Volatility

PRIDX vs. VSS - Volatility Comparison

The current volatility for T. Rowe Price International Discovery Fund (PRIDX) is 3.87%, while Vanguard FTSE All-World ex-US Small-Cap ETF (VSS) has a volatility of 5.33%. This indicates that PRIDX experiences smaller price fluctuations and is considered to be less risky than VSS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PRIDX	VSS	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.87%	5.33%	-1.46%
Volatility (6M) Calculated over the trailing 6-month period	11.70%	12.64%	-0.94%
Volatility (1Y) Calculated over the trailing 1-year period	14.19%	14.81%	-0.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.71%	16.46%	+0.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.64%	17.27%	-0.63%

PRIDX vs. VSS - Expense Ratio Comparison

PRIDX has a 1.23% expense ratio, which is higher than VSS's 0.07% expense ratio.

Dividends

PRIDX vs. VSS - Dividend Comparison

PRIDX's dividend yield for the trailing twelve months is around 4.49%, more than VSS's 3.07% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PRIDX T. Rowe Price International Discovery Fund	4.49%	4.88%	4.03%	2.05%	3.18%	15.35%	4.30%	1.48%	6.20%	3.11%	1.81%	5.00%
VSS Vanguard FTSE All-World ex-US Small-Cap ETF	3.07%	3.39%	3.44%	3.14%	2.30%	2.74%	1.90%	3.25%	2.80%	2.83%	2.93%	2.66%

Frequently Asked Questions

Can I hold both PRIDX and VSS in my portfolio?

With a correlation of 0.93, PRIDX and VSS move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, PRIDX or VSS?

VSS has higher volatility (5.33%) compared to PRIDX (3.87%). In terms of maximum drawdown, PRIDX dropped -65.01% vs VSS's -43.51%.

Which has better risk-adjusted returns?

VSS currently has the higher Sharpe Ratio (1.85 vs 1.55), 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.