VIHAX vs. BUFBX

Last updated Jun 4, 2026

VIHAX (Vanguard International High Dividend Yield Index Fund Admiral Shares) and BUFBX (Buffalo Flexible Income Fund) are both Large Cap Value Equities funds. Over the past 10 years, VIHAX returned 10.82%/yr vs 10.00%/yr for BUFBX. A 0.71 correlation means they provide meaningful diversification when combined. VIHAX charges 0.22%/yr vs 1.01%/yr for BUFBX.

Performance

VIHAX vs. BUFBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard International High Dividend Yield Index Fund Admiral Shares (VIHAX) and Buffalo Flexible Income Fund (BUFBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with VIHAX having a 12.57% return and BUFBX slightly higher at 12.83%. Over the past 10 years, VIHAX has outperformed BUFBX with an annualized return of 10.82%, while BUFBX has yielded a comparatively lower 10.00% annualized return.

VIHAX

• 1D: 0.64%
• 1M: 2.92%
• YTD: 12.57%
• 6M: 16.00%
• 1Y: 31.59%
• 3Y*: 22.45%
• 5Y*: 12.36%
• 10Y*: 10.82%

BUFBX

• 1D: 0.57%
• 1M: 3.64%
• YTD: 12.83%
• 6M: 12.77%
• 1Y: 19.88%
• 3Y*: 13.91%
• 5Y*: 11.23%
• 10Y*: 10.00%

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

VIHAX vs. BUFBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VIHAX Vanguard International High Dividend Yield Index Fund Admiral Shares	12.57%	38.01%	6.96%	16.81%	-6.88%	15.01%	-0.73%	20.03%	-12.38%	22.40%
BUFBX Buffalo Flexible Income Fund	12.83%	10.37%	10.26%	7.42%	3.97%	29.97%	-2.27%	18.76%	-7.01%	13.20%

Correlation

The correlation between VIHAX and BUFBX is 0.41, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.41
Correlation (3Y) Calculated over the trailing 3-year period	0.53
Correlation (5Y) Calculated over the trailing 5-year period	0.65
Correlation (10Y) Calculated over the trailing 10-year period	0.71
Correlation (All Time) Calculated using the full available price history since Mar 8, 2016	0.71

Over the past year, the correlation between VIHAX and BUFBX has dropped to 0.41 - well below their long-term average of 0.71, suggesting their price drivers have been diverging.

Return for Risk

VIHAX vs. BUFBX — Risk / Return Rank

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

VIHAX

VIHAX Risk / Return Rank: 73
VIHAX Sharpe Ratio Rank: 81
VIHAX Sortino Ratio Rank: 74
VIHAX Omega Ratio Rank: 73
VIHAX Calmar Ratio Rank: 71
VIHAX Martin Ratio Rank: 64

BUFBX

BUFBX Risk / Return Rank: 71
BUFBX Sharpe Ratio Rank: 60
BUFBX Sortino Ratio Rank: 59
BUFBX Omega Ratio Rank: 52
BUFBX Calmar Ratio Rank: 97
BUFBX Martin Ratio Rank: 89

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.

VIHAX vs. BUFBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard International High Dividend Yield Index Fund Admiral Shares (VIHAX) and Buffalo Flexible Income Fund (BUFBX). 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.

	VIHAX	BUFBX	Difference
Sharpe ratio: Return per unit of total volatility	2.63	2.28	+0.35
Sortino ratio: Return per unit of downside risk	3.59	3.24	+0.35
Omega ratio: Gain probability vs. loss probability	1.48	1.40	+0.09
Calmar ratio: Return relative to maximum drawdown	3.27	7.18	-3.91
Martin ratio: Return relative to average drawdown	12.49	17.54	-5.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VIHAX vs. BUFBX - Sharpe Ratio Comparison

The current VIHAX Sharpe Ratio is 2.63, which is comparable to the BUFBX Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of VIHAX and BUFBX, 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

	VIHAX	BUFBX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.63	2.28	+0.35
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.90	0.84	+0.06
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.68	0.64	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.69	0.59	+0.10

Drawdowns

VIHAX vs. BUFBX - Drawdown Comparison

The maximum VIHAX drawdown since its inception was -38.80%, roughly equal to the maximum BUFBX drawdown of -39.78%. Use the drawdown chart below to compare losses from any high point for VIHAX and BUFBX.

Drawdown Indicators

	VIHAX	BUFBX	Difference
Max Drawdown Largest peak-to-trough decline	-38.80%	-39.78%	+0.98%
Max Drawdown (1Y) Largest decline over 1 year	-9.53%	-2.83%	-6.70%
Max Drawdown (3Y) Largest decline over 3 years	-12.29%	-12.85%	+0.56%
Max Drawdown (5Y) Largest decline over 5 years	-23.92%	-14.67%	-9.25%
Max Drawdown (10Y) Largest decline over 10 years	-38.80%	-35.51%	-3.29%
Current Drawdown Current decline from peak	-0.33%	-0.22%	-0.11%
Average Drawdown Average peak-to-trough decline	-6.02%	-4.72%	-1.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.49%	1.16%	+1.33%

Volatility

VIHAX vs. BUFBX - Volatility Comparison

Vanguard International High Dividend Yield Index Fund Admiral Shares (VIHAX) has a higher volatility of 3.46% compared to Buffalo Flexible Income Fund (BUFBX) at 3.06%. This indicates that VIHAX's price experiences larger fluctuations and is considered to be riskier than BUFBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VIHAX	BUFBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.46%	3.06%	+0.40%
Volatility (6M) Calculated over the trailing 6-month period	9.63%	6.61%	+3.02%
Volatility (1Y) Calculated over the trailing 1-year period	11.89%	8.93%	+2.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.75%	13.40%	+0.35%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.90%	15.60%	+0.30%

VIHAX vs. BUFBX - Expense Ratio Comparison

VIHAX has a 0.22% expense ratio, which is lower than BUFBX's 1.01% expense ratio.

Dividends

VIHAX vs. BUFBX - Dividend Comparison

VIHAX's dividend yield for the trailing twelve months is around 3.39%, less than BUFBX's 7.99% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFBX Buffalo Flexible Income Fund	7.99%	9.10%	3.77%	3.48%	4.16%	5.57%	3.33%	2.73%	6.01%	5.49%	2.39%	3.67%
VIHAX Vanguard International High Dividend Yield Index Fund Admiral Shares	3.39%	3.69%	4.85%	4.58%	4.70%	4.30%	3.22%	5.63%	4.28%	3.16%	2.37%	0.00%

Frequently Asked Questions

Can I hold both VIHAX and BUFBX in my portfolio?

VIHAX and BUFBX have a correlation of 0.41, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VIHAX or BUFBX?

VIHAX has higher volatility (3.46%) compared to BUFBX (3.06%). In terms of maximum drawdown, VIHAX dropped -38.80% vs BUFBX's -39.78%.

Which has better risk-adjusted returns?

VIHAX currently has the higher Sharpe Ratio (2.63 vs 2.28), 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.