OANMX vs. VSMPX

Last updated Jun 24, 2026

OANMX (Oakmark Fund Institutional Class) and VSMPX (Vanguard Total Stock Market Index Fund Institutional Plus Shares) are both mutual funds - OANMX is a Large Cap Value Equities fund managed by Oakmark, while VSMPX is a Large Cap Blend Equities fund tracking the CRSP US Total Market Index. Over the past 5 years, OANMX returned 9.96%/yr vs 12.38%/yr for VSMPX. Their correlation of 0.85 suggests significant overlap in exposure. OANMX charges 0.68%/yr vs 0.02%/yr for VSMPX.

Performance

OANMX vs. VSMPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark Fund Institutional Class (OANMX) and Vanguard Total Stock Market Index Fund Institutional Plus Shares (VSMPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OANMX achieves a -1.91% return, which is significantly lower than VSMPX's 10.35% return.

OANMX

• 1D: 0.00%
• 1M: -1.02%
• YTD: -1.91%
• 6M: -2.43%
• 1Y: 8.94%
• 3Y*: 14.59%
• 5Y*: 9.96%
• 10Y*: —

VSMPX

• 1D: -0.34%
• 1M: 0.56%
• YTD: 10.35%
• 6M: 9.20%
• 1Y: 25.96%
• 3Y*: 21.19%
• 5Y*: 12.38%
• 10Y*: 15.31%

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

OANMX vs. VSMPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OANMX Oakmark Fund Institutional Class	-1.91%	14.38%	16.28%	31.21%	-13.18%	34.87%	13.09%	27.35%	-12.62%	15.96%
VSMPX Vanguard Total Stock Market Index Fund Institutional Plus Shares	10.35%	17.15%	23.26%	26.53%	-19.50%	25.74%	21.01%	30.79%	-5.16%	21.19%

Correlation

The correlation between OANMX and VSMPX is 0.62, 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	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.82
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.85

Over the past year, the correlation between OANMX and VSMPX has dropped to 0.62 - well below their long-term average of 0.85, suggesting their price drivers have been diverging.

Return for Risk

OANMX vs. VSMPX — Risk / Return Rank

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

OANMX

OANMX Risk / Return Rank: 11
OANMX Sharpe Ratio Rank: 9
OANMX Sortino Ratio Rank: 9
OANMX Omega Ratio Rank: 9
OANMX Calmar Ratio Rank: 16
OANMX Martin Ratio Rank: 12

VSMPX

VSMPX Risk / Return Rank: 65
VSMPX Sharpe Ratio Rank: 62
VSMPX Sortino Ratio Rank: 56
VSMPX Omega Ratio Rank: 57
VSMPX Calmar Ratio Rank: 70
VSMPX Martin Ratio Rank: 79

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.

OANMX vs. VSMPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark Fund Institutional Class (OANMX) and Vanguard Total Stock Market Index Fund Institutional Plus Shares (VSMPX). 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.

	OANMX	VSMPX	Difference
Sharpe ratio: Return per unit of total volatility	0.70	2.13	-1.43
Sortino ratio: Return per unit of downside risk	1.09	2.89	-1.80
Omega ratio: Gain probability vs. loss probability	1.13	1.38	-0.25
Calmar ratio: Return relative to maximum drawdown	1.34	3.06	-1.72
Martin ratio: Return relative to average drawdown	3.29	13.69	-10.40

OANMX vs. VSMPX - Sharpe Ratio Comparison

The current OANMX Sharpe Ratio is 0.70, which is lower than the VSMPX Sharpe Ratio of 2.13. The chart below compares the historical Sharpe Ratios of OANMX and VSMPX, 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

OANMX vs. VSMPX - Drawdown Comparison

The maximum OANMX drawdown since its inception was -40.08%, which is greater than VSMPX's maximum drawdown of -34.97%. Use the drawdown chart below to compare losses from any high point for OANMX and VSMPX.

Drawdown Indicators

	OANMX	VSMPX	Difference
Max Drawdown Largest peak-to-trough decline	-40.08%	-34.97%	-5.11%
Max Drawdown (1Y) Largest decline over 1 year	-6.93%	-8.92%	+1.99%
Max Drawdown (3Y) Largest decline over 3 years	-17.01%	-19.36%	+2.35%
Max Drawdown (5Y) Largest decline over 5 years	-23.55%	-25.35%	+1.80%
Max Drawdown (10Y) Largest decline over 10 years	—	-34.97%	—
Current Drawdown Current decline from peak	-4.43%	-1.47%	-2.96%
Average Drawdown Average peak-to-trough decline	-5.57%	-4.58%	-0.99%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.81%	1.99%	+0.82%

Volatility

OANMX vs. VSMPX - Volatility Comparison

The current volatility for Oakmark Fund Institutional Class (OANMX) is 3.77%, while Vanguard Total Stock Market Index Fund Institutional Plus Shares (VSMPX) has a volatility of 4.77%. This indicates that OANMX experiences smaller price fluctuations and is considered to be less risky than VSMPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OANMX	VSMPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.77%	4.77%	-1.00%
Volatility (6M) Calculated over the trailing 6-month period	9.44%	10.04%	-0.60%
Volatility (1Y) Calculated over the trailing 1-year period	13.20%	12.83%	+0.37%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.28%	17.45%	+0.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.61%	18.46%	+2.15%

OANMX vs. VSMPX - Expense Ratio Comparison

OANMX has a 0.68% expense ratio, which is higher than VSMPX's 0.02% expense ratio.

Dividends

OANMX vs. VSMPX - Dividend Comparison

OANMX's dividend yield for the trailing twelve months is around 1.16%, more than VSMPX's 1.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
OANMX Oakmark Fund Institutional Class	1.16%	1.14%	1.34%	1.22%	1.17%	1.94%	0.33%	8.53%	8.37%	0.66%	0.00%
VSMPX Vanguard Total Stock Market Index Fund Institutional Plus Shares	1.03%	1.13%	1.27%	1.43%	1.67%	1.22%	1.43%	1.78%	2.05%	1.73%	1.95%

Frequently Asked Questions

Can I hold both OANMX and VSMPX in my portfolio?

OANMX and VSMPX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OANMX or VSMPX?

VSMPX has higher volatility (4.77%) compared to OANMX (3.77%). In terms of maximum drawdown, OANMX dropped -40.08% vs VSMPX's -34.97%.

Which has better risk-adjusted returns?

VSMPX currently has the higher Sharpe Ratio (2.13 vs 0.70), 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.