BOSVX vs. VFIAX

Last updated Jun 24, 2026

BOSVX (Bridgeway Omni Small-Cap Value Fund) and VFIAX (Vanguard 500 Index Fund Admiral Shares) are both mutual funds - BOSVX is a Small Cap Value Equities fund managed by Bridgeway, while VFIAX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, BOSVX returned 11.89%/yr vs 15.76%/yr for VFIAX. A 0.74 correlation means they provide meaningful diversification when combined. BOSVX charges 0.60%/yr vs 0.04%/yr for VFIAX.

Performance

BOSVX vs. VFIAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Bridgeway Omni Small-Cap Value Fund (BOSVX) and Vanguard 500 Index Fund Admiral Shares (VFIAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BOSVX achieves a 20.89% return, which is significantly higher than VFIAX's 9.77% return. Over the past 10 years, BOSVX has underperformed VFIAX with an annualized return of 11.89%, while VFIAX has yielded a comparatively higher 15.76% annualized return.

BOSVX

• 1D: 0.18%
• 1M: 2.61%
• YTD: 20.89%
• 6M: 19.06%
• 1Y: 43.53%
• 3Y*: 19.51%
• 5Y*: 10.57%
• 10Y*: 11.89%

VFIAX

• 1D: -0.36%
• 1M: 0.10%
• YTD: 9.77%
• 6M: 8.77%
• 1Y: 25.48%
• 3Y*: 21.36%
• 5Y*: 13.57%
• 10Y*: 15.76%

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

BOSVX vs. VFIAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BOSVX Bridgeway Omni Small-Cap Value Fund	20.89%	9.78%	4.21%	18.18%	-4.27%	48.03%	0.83%	13.90%	-17.15%	5.91%
VFIAX Vanguard 500 Index Fund Admiral Shares	9.77%	17.83%	24.97%	26.24%	-18.16%	28.65%	18.32%	31.46%	-4.45%	21.78%

Correlation

The correlation between BOSVX and VFIAX is 0.61, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.63
Correlation (5Y) Calculated over the trailing 5-year period	0.69
Correlation (10Y) Calculated over the trailing 10-year period	0.69
Correlation (All Time) Calculated using the full available price history since Aug 31, 2011	0.74

The correlation between BOSVX and VFIAX shifts across timeframes, from 0.61 (1 year) to 0.74 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BOSVX vs. VFIAX — Risk / Return Rank

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

BOSVX

BOSVX Risk / Return Rank: 78
BOSVX Sharpe Ratio Rank: 73
BOSVX Sortino Ratio Rank: 71
BOSVX Omega Ratio Rank: 64
BOSVX Calmar Ratio Rank: 95
BOSVX Martin Ratio Rank: 89

VFIAX

VFIAX Risk / Return Rank: 65
VFIAX Sharpe Ratio Rank: 63
VFIAX Sortino Ratio Rank: 57
VFIAX Omega Ratio Rank: 59
VFIAX Calmar Ratio Rank: 68
VFIAX Martin Ratio Rank: 78

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.

BOSVX vs. VFIAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Bridgeway Omni Small-Cap Value Fund (BOSVX) and Vanguard 500 Index Fund Admiral Shares (VFIAX). 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.

	BOSVX	VFIAX	Difference
Sharpe ratio: Return per unit of total volatility	2.28	2.15	+0.14
Sortino ratio: Return per unit of downside risk	3.19	2.91	+0.29
Omega ratio: Gain probability vs. loss probability	1.40	1.39	+0.02
Calmar ratio: Return relative to maximum drawdown	5.47	3.01	+2.46
Martin ratio: Return relative to average drawdown	15.97	13.60	+2.37

BOSVX vs. VFIAX - Sharpe Ratio Comparison

The current BOSVX Sharpe Ratio is 2.28, which is comparable to the VFIAX Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of BOSVX and VFIAX, 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

BOSVX vs. VFIAX - Drawdown Comparison

The maximum BOSVX drawdown since its inception was -57.14%, roughly equal to the maximum VFIAX drawdown of -55.20%. Use the drawdown chart below to compare losses from any high point for BOSVX and VFIAX.

Drawdown Indicators

	BOSVX	VFIAX	Difference
Max Drawdown Largest peak-to-trough decline	-57.14%	-55.20%	-1.94%
Max Drawdown (1Y) Largest decline over 1 year	-8.27%	-8.90%	+0.63%
Max Drawdown (3Y) Largest decline over 3 years	-28.71%	-18.75%	-9.96%
Max Drawdown (5Y) Largest decline over 5 years	-28.71%	-24.53%	-4.18%
Max Drawdown (10Y) Largest decline over 10 years	-57.14%	-33.83%	-23.31%
Current Drawdown Current decline from peak	-2.05%	-1.72%	-0.33%
Average Drawdown Average peak-to-trough decline	-8.55%	-9.38%	+0.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.83%	1.97%	+0.86%

Volatility

BOSVX vs. VFIAX - Volatility Comparison

Bridgeway Omni Small-Cap Value Fund (BOSVX) and Vanguard 500 Index Fund Admiral Shares (VFIAX) have volatilities of 4.73% and 4.67%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BOSVX	VFIAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.73%	4.67%	+0.06%
Volatility (6M) Calculated over the trailing 6-month period	13.55%	9.84%	+3.71%
Volatility (1Y) Calculated over the trailing 1-year period	19.83%	12.50%	+7.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.56%	16.99%	+5.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.06%	18.11%	+6.95%

BOSVX vs. VFIAX - Expense Ratio Comparison

BOSVX has a 0.60% expense ratio, which is higher than VFIAX's 0.04% expense ratio.

Dividends

BOSVX vs. VFIAX - Dividend Comparison

BOSVX's dividend yield for the trailing twelve months is around 8.26%, more than VFIAX's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BOSVX Bridgeway Omni Small-Cap Value Fund	8.26%	9.99%	9.71%	8.55%	21.96%	4.12%	1.21%	0.99%	10.36%	6.66%	0.89%	1.00%
VFIAX Vanguard 500 Index Fund Admiral Shares	1.03%	1.12%	1.24%	1.45%	1.68%	1.24%	1.53%	1.87%	2.05%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both BOSVX and VFIAX in my portfolio?

BOSVX and VFIAX have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BOSVX or VFIAX?

BOSVX has higher volatility (4.73%) compared to VFIAX (4.67%). In terms of maximum drawdown, BOSVX dropped -57.14% vs VFIAX's -55.20%.

Which has better risk-adjusted returns?

BOSVX currently has the higher Sharpe Ratio (2.28 vs 2.15), 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.