VMVAX vs. PSSMX

Last updated Aug 2, 2026

VMVAX (Vanguard Mid-Cap Value Index Fund Admiral Shares) and PSSMX (Principal SmallCap S&P 600 Index Fund) are both mutual funds - VMVAX is a Mid Cap Value Equities fund tracking the CRSP US Mid Cap Value Index, while PSSMX is a Small Cap Blend Equities fund managed by Principal. Over the past 10 years, VMVAX returned 10.77%/yr vs 10.79%/yr for PSSMX. Their correlation of 0.88 means they have usually moved in the same direction. VMVAX charges 0.07%/yr vs 0.73%/yr for PSSMX.

Performance

VMVAX vs. PSSMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX) and Principal SmallCap S&P 600 Index Fund (PSSMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VMVAX achieves a 16.91% return, which is significantly lower than PSSMX's 21.15% return. Both investments have delivered pretty close results over the past 10 years, with VMVAX having a 10.77% annualized return and PSSMX not far ahead at 10.79%.

VMVAX

• 1D: -0.33%
• 1M: 2.54%
• 6M: 12.16%
• YTD: 16.91%
• 1Y: 26.28%
• 3Y*: 15.18%
• 5Y*: 10.18%
• 10Y*: 10.77%
• ALL TIME*: 12.53%

PSSMX

• 1D: 0.85%
• 1M: -0.64%
• 6M: 14.80%
• YTD: 21.15%
• 1Y: 35.09%
• 3Y*: 15.43%
• 5Y*: 8.35%
• 10Y*: 10.79%
• ALL TIME*: 9.60%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
PSSMX Principal SmallCap S&P 600 Index Fund	$0.00	$0.00	$0.00
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	$0.00	$0.00	$0.00

VMVAX vs. PSSMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	16.91%	12.06%	13.63%	10.12%	-7.89%	28.77%	2.45%	28.03%	-12.44%	17.04%
PSSMX Principal SmallCap S&P 600 Index Fund	21.15%	5.34%	16.60%	15.18%	-16.69%	25.39%	10.65%	21.99%	-9.42%	12.46%

Correlation

The correlation between VMVAX and PSSMX is 0.80, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.80
Correlation (3Y) Balances recent behavior with more history.	0.85
Correlation (5Y) Shows whether the relationship held over a longer period.	0.88
Correlation (10Y) Provides a long-term view across more market conditions.	0.88
Correlation (All Time) Calculated using the full available price history since Sep 27, 2011	0.88

The correlation between VMVAX and PSSMX has been stable across timeframes, ranging from 0.80 to 0.88 - a consistent structural relationship.

Return for Risk

VMVAX vs. PSSMX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

VMVAX

VMVAX Risk / Return Rank: 89
VMVAX Sharpe Ratio Rank: 89
VMVAX Sortino Ratio Rank: 87
VMVAX Omega Ratio Rank: 83
VMVAX Calmar Ratio Rank: 92
VMVAX Martin Ratio Rank: 93

PSSMX

PSSMX Risk / Return Rank: 82
PSSMX Sharpe Ratio Rank: 77
PSSMX Sortino Ratio Rank: 78
PSSMX Omega Ratio Rank: 72
PSSMX Calmar Ratio Rank: 92
PSSMX Martin Ratio Rank: 90

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

VMVAX vs. PSSMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX) and Principal SmallCap S&P 600 Index Fund (PSSMX). 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.

	VMVAX	PSSMX	Difference
Sharpe ratio: Return per unit of total volatility	2.19	1.81	+0.38
Sortino ratio: Return per unit of downside risk	3.18	2.68	+0.50
Omega ratio: Gain probability vs. loss probability	1.39	1.32	+0.07
Calmar ratio: Return relative to maximum drawdown	3.58	3.59	-0.01
Martin ratio: Return relative to average drawdown	13.96	12.27	+1.69

VMVAX vs. PSSMX - Sharpe Ratio Comparison

The current VMVAX Sharpe Ratio is 2.19, which is comparable to the PSSMX Sharpe Ratio of 1.81. The chart below compares the historical Sharpe Ratios of VMVAX and PSSMX, 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

VMVAX vs. PSSMX - Drawdown Comparison

The maximum VMVAX drawdown since its inception was -43.07%, smaller than the maximum PSSMX drawdown of -58.43%. Use the drawdown chart below to compare losses from any high point for VMVAX and PSSMX.

Drawdown Indicators

	VMVAX	PSSMX	Difference
Max Drawdown Largest peak-to-trough decline	-43.07%	-58.43%	+15.36%
Max Drawdown (1Y) Largest decline over 1 year	-6.95%	-8.76%	+1.81%
Max Drawdown (3Y) Largest decline over 3 years	-18.40%	-24.30%	+5.90%
Max Drawdown (5Y) Largest decline over 5 years	-19.75%	-27.01%	+7.26%
Max Drawdown (10Y) Largest decline over 10 years	-43.07%	-44.85%	+1.78%
Current Drawdown Current decline from peak	-1.07%	-1.87%	+0.80%
Average Drawdown Average peak-to-trough decline	-4.33%	-9.47%	+5.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.78%	2.57%	-0.79%

Volatility

VMVAX vs. PSSMX - Volatility Comparison

The current volatility for Vanguard Mid-Cap Value Index Fund Admiral Shares (VMVAX) is 2.69%, while Principal SmallCap S&P 600 Index Fund (PSSMX) has a volatility of 3.47%. This indicates that VMVAX experiences smaller price fluctuations and is considered to be less risky than PSSMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VMVAX	PSSMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.69%	3.47%	-0.78%
Volatility (6M) Calculated over the trailing 6-month period	8.12%	11.69%	-3.57%
Volatility (1Y) Calculated over the trailing 1-year period	11.39%	17.41%	-6.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.88%	21.62%	-5.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.69%	22.86%	-4.17%

VMVAX vs. PSSMX - Expense Ratio Comparison

VMVAX has a 0.07% expense ratio, which is lower than PSSMX's 0.73% expense ratio.

Dividends

VMVAX vs. PSSMX - Dividend Comparison

VMVAX's dividend yield for the trailing twelve months is around 1.81%, less than PSSMX's 8.24% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PSSMX Principal SmallCap S&P 600 Index Fund	8.24%	9.98%	15.91%	3.75%	10.45%	8.23%	1.67%	6.56%	13.08%	6.03%	6.15%	8.07%
VMVAX Vanguard Mid-Cap Value Index Fund Admiral Shares	1.81%	2.10%	2.11%	2.26%	2.27%	1.78%	2.36%	2.08%	2.75%	1.86%	1.91%	2.04%

Frequently Asked Questions

Can I hold both VMVAX and PSSMX in my portfolio?

VMVAX and PSSMX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VMVAX or PSSMX?

PSSMX has higher volatility (3.47%) compared to VMVAX (2.69%). In terms of maximum drawdown, VMVAX dropped -43.07% vs PSSMX's -58.43%.

Which has better risk-adjusted returns?

VMVAX currently has the higher Sharpe Ratio (2.19 vs 1.81), 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.