PXNIX vs. VIIIX

Last updated Jun 25, 2026

PXNIX (Pax International Sustainable Economy Fund Institutional Class) and VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) are both mutual funds - PXNIX is a Large Cap Blend Equities fund managed by Pax World Funds, while VIIIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, PXNIX returned 9.39%/yr vs 15.70%/yr for VIIIX. A 0.73 correlation means they provide meaningful diversification when combined. PXNIX charges 0.47%/yr vs 0.02%/yr for VIIIX.

Performance

PXNIX vs. VIIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pax International Sustainable Economy Fund Institutional Class (PXNIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PXNIX achieves a 6.72% return, which is significantly lower than VIIIX's 8.21% return. Over the past 10 years, PXNIX has underperformed VIIIX with an annualized return of 9.39%, while VIIIX has yielded a comparatively higher 15.70% annualized return.

PXNIX

• 1D: -2.10%
• 1M: -0.61%
• YTD: 6.72%
• 6M: 6.19%
• 1Y: 16.63%
• 3Y*: 16.18%
• 5Y*: 7.88%
• 10Y*: 9.39%

VIIIX

• 1D: -1.44%
• 1M: -1.34%
• YTD: 8.21%
• 6M: 6.88%
• 1Y: 22.35%
• 3Y*: 21.22%
• 5Y*: 13.28%
• 10Y*: 15.70%

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

PXNIX vs. VIIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PXNIX Pax International Sustainable Economy Fund Institutional Class	6.72%	28.91%	5.03%	19.28%	-17.81%	11.23%	10.79%	23.03%	-12.92%	23.35%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	8.21%	17.87%	26.29%	25.79%	-18.14%	28.69%	18.41%	31.48%	-4.41%	21.82%

Correlation

The correlation between PXNIX and VIIIX is 0.78, 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	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (10Y) Calculated over the trailing 10-year period	0.77
Correlation (All Time) Calculated using the full available price history since Jan 3, 2012	0.73

The correlation between PXNIX and VIIIX has been stable across timeframes, ranging from 0.71 to 0.78 - a consistent structural relationship.

Return for Risk

PXNIX vs. VIIIX — Risk / Return Rank

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

PXNIX

PXNIX Risk / Return Rank: 23
PXNIX Sharpe Ratio Rank: 21
PXNIX Sortino Ratio Rank: 21
PXNIX Omega Ratio Rank: 21
PXNIX Calmar Ratio Rank: 24
PXNIX Martin Ratio Rank: 30

VIIIX

VIIIX Risk / Return Rank: 52
VIIIX Sharpe Ratio Rank: 49
VIIIX Sortino Ratio Rank: 44
VIIIX Omega Ratio Rank: 47
VIIIX Calmar Ratio Rank: 53
VIIIX Martin Ratio Rank: 66

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.

PXNIX vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pax International Sustainable Economy Fund Institutional Class (PXNIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). 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.

	PXNIX	VIIIX	Difference
Sharpe ratio: Return per unit of total volatility	1.14	1.90	-0.76
Sortino ratio: Return per unit of downside risk	1.67	2.59	-0.91
Omega ratio: Gain probability vs. loss probability	1.21	1.34	-0.13
Calmar ratio: Return relative to maximum drawdown	1.59	2.68	-1.09
Martin ratio: Return relative to average drawdown	6.09	12.03	-5.93

PXNIX vs. VIIIX - Sharpe Ratio Comparison

The current PXNIX Sharpe Ratio is 1.14, which is lower than the VIIIX Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of PXNIX and VIIIX, 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

PXNIX vs. VIIIX - Drawdown Comparison

The maximum PXNIX drawdown since its inception was -32.54%, smaller than the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for PXNIX and VIIIX.

Drawdown Indicators

	PXNIX	VIIIX	Difference
Max Drawdown Largest peak-to-trough decline	-32.54%	-55.18%	+22.64%
Max Drawdown (1Y) Largest decline over 1 year	-11.58%	-8.90%	-2.68%
Max Drawdown (3Y) Largest decline over 3 years	-13.47%	-18.75%	+5.28%
Max Drawdown (5Y) Largest decline over 5 years	-32.54%	-24.50%	-8.04%
Max Drawdown (10Y) Largest decline over 10 years	-32.54%	-33.79%	+1.25%
Current Drawdown Current decline from peak	-3.34%	-3.13%	-0.21%
Average Drawdown Average peak-to-trough decline	-6.68%	-10.00%	+3.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.02%	1.98%	+1.04%

Volatility

PXNIX vs. VIIIX - Volatility Comparison

Pax International Sustainable Economy Fund Institutional Class (PXNIX) has a higher volatility of 5.40% compared to Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) at 4.90%. This indicates that PXNIX's price experiences larger fluctuations and is considered to be riskier than VIIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PXNIX	VIIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.40%	4.90%	+0.50%
Volatility (6M) Calculated over the trailing 6-month period	13.43%	9.93%	+3.50%
Volatility (1Y) Calculated over the trailing 1-year period	16.13%	12.57%	+3.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.27%	17.00%	-0.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.32%	18.08%	-1.76%

PXNIX vs. VIIIX - Expense Ratio Comparison

PXNIX has a 0.47% expense ratio, which is higher than VIIIX's 0.02% expense ratio.

Dividends

PXNIX vs. VIIIX - Dividend Comparison

PXNIX's dividend yield for the trailing twelve months is around 5.23%, more than VIIIX's 2.49% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PXNIX Pax International Sustainable Economy Fund Institutional Class	5.23%	7.17%	3.54%	2.38%	2.64%	4.69%	1.82%	2.58%	2.84%	2.54%	2.74%	2.04%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.49%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%

Frequently Asked Questions

Can I hold both PXNIX and VIIIX in my portfolio?

PXNIX and VIIIX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PXNIX or VIIIX?

PXNIX has higher volatility (5.40%) compared to VIIIX (4.90%). In terms of maximum drawdown, PXNIX dropped -32.54% vs VIIIX's -55.18%.

Which has better risk-adjusted returns?

VIIIX currently has the higher Sharpe Ratio (1.90 vs 1.14), 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.