VGSTX vs. REPX

Last updated Jun 5, 2026

VGSTX (Vanguard STAR Fund) is Diversified Portfolio fund managed by Vanguard, while REPX (Riley Exploration Permian, Inc.) is a stock. Over the past 10 years, VGSTX returned 9.58%/yr vs 19.41%/yr for REPX. At a 0.16 correlation, their price movements are largely independent.

Performance

VGSTX vs. REPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard STAR Fund (VGSTX) and Riley Exploration Permian, Inc. (REPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VGSTX achieves a 5.80% return, which is significantly lower than REPX's 41.02% return. Over the past 10 years, VGSTX has underperformed REPX with an annualized return of 9.58%, while REPX has yielded a comparatively higher 19.41% annualized return.

VGSTX

• 1D: -0.61%
• 1M: 2.32%
• YTD: 5.80%
• 6M: 6.49%
• 1Y: 17.18%
• 3Y*: 14.65%
• 5Y*: 6.53%
• 10Y*: 9.58%

REPX

• 1D: 2.11%
• 1M: -1.55%
• YTD: 41.02%
• 6M: 34.02%
• 1Y: 45.04%
• 3Y*: 7.66%
• 5Y*: 5.02%
• 10Y*: 19.41%

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

VGSTX vs. REPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VGSTX Vanguard STAR Fund	5.80%	15.88%	13.69%	17.14%	-18.05%	9.65%	21.45%	22.21%	-5.33%	16.95%
REPX Riley Exploration Permian, Inc.	41.02%	-12.73%	23.84%	-3.86%	60.15%	34.52%	153.01%	-48.41%	18.74%	14.29%

Correlation

The correlation between VGSTX and REPX is -0.01, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.01
Correlation (3Y) Calculated over the trailing 3-year period	0.22
Correlation (5Y) Calculated over the trailing 5-year period	0.29
Correlation (10Y) Calculated over the trailing 10-year period	0.20
Correlation (All Time) Calculated using the full available price history since Dec 29, 1998	0.16

The correlation between VGSTX and REPX shifts across timeframes, from -0.01 (1 year) to 0.29 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

VGSTX vs. REPX — Risk / Return Rank

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

VGSTX

VGSTX Risk / Return Rank: 50
VGSTX Sharpe Ratio Rank: 50
VGSTX Sortino Ratio Rank: 50
VGSTX Omega Ratio Rank: 48
VGSTX Calmar Ratio Rank: 47
VGSTX Martin Ratio Rank: 57

REPX

REPX Risk / Return Rank: 71
REPX Sharpe Ratio Rank: 72
REPX Sortino Ratio Rank: 66
REPX Omega Ratio Rank: 65
REPX Calmar Ratio Rank: 78
REPX Martin Ratio Rank: 77

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.

VGSTX vs. REPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard STAR Fund (VGSTX) and Riley Exploration Permian, Inc. (REPX). 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.

	VGSTX	REPX	Difference
Sharpe ratio: Return per unit of total volatility	2.09	1.00	+1.09
Sortino ratio: Return per unit of downside risk	2.99	1.52	+1.47
Omega ratio: Gain probability vs. loss probability	1.38	1.20	+0.19
Calmar ratio: Return relative to maximum drawdown	2.62	2.35	+0.28
Martin ratio: Return relative to average drawdown	11.43	5.38	+6.05
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VGSTX vs. REPX - Sharpe Ratio Comparison

The current VGSTX Sharpe Ratio is 2.09, which is higher than the REPX Sharpe Ratio of 1.00. The chart below compares the historical Sharpe Ratios of VGSTX and REPX, 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

	VGSTX	REPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.09	1.00	+1.09
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.56	0.08	+0.47
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.81	0.17	+0.64
Sharpe Ratio (All Time) Calculated using the full available price history	0.81	-0.09	+0.91

Drawdowns

VGSTX vs. REPX - Drawdown Comparison

The maximum VGSTX drawdown since its inception was -38.62%, smaller than the maximum REPX drawdown of -99.74%. Use the drawdown chart below to compare losses from any high point for VGSTX and REPX.

Drawdown Indicators

	VGSTX	REPX	Difference
Max Drawdown Largest peak-to-trough decline	-38.62%	-99.74%	+61.12%
Max Drawdown (1Y) Largest decline over 1 year	-6.76%	-19.29%	+12.53%
Max Drawdown (3Y) Largest decline over 3 years	-11.77%	-44.61%	+32.84%
Max Drawdown (5Y) Largest decline over 5 years	-25.55%	-68.56%	+43.01%
Max Drawdown (10Y) Largest decline over 10 years	-25.55%	-72.42%	+46.87%
Current Drawdown Current decline from peak	-0.61%	-97.39%	+96.78%
Average Drawdown Average peak-to-trough decline	-4.03%	-88.49%	+84.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.55%	8.39%	-6.84%

Volatility

VGSTX vs. REPX - Volatility Comparison

The current volatility for Vanguard STAR Fund (VGSTX) is 2.53%, while Riley Exploration Permian, Inc. (REPX) has a volatility of 21.53%. This indicates that VGSTX experiences smaller price fluctuations and is considered to be less risky than REPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VGSTX	REPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.53%	21.53%	-19.00%
Volatility (6M) Calculated over the trailing 6-month period	6.70%	35.98%	-29.28%
Volatility (1Y) Calculated over the trailing 1-year period	8.49%	45.31%	-36.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.82%	61.16%	-49.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.83%	114.19%	-102.36%

Dividends

VGSTX vs. REPX - Dividend Comparison

VGSTX's dividend yield for the trailing twelve months is around 8.63%, more than REPX's 4.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
REPX Riley Exploration Permian, Inc.	4.36%	5.83%	4.57%	5.07%	4.32%	4.50%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
VGSTX Vanguard STAR Fund	8.63%	9.13%	10.67%	5.35%	8.34%	6.70%	6.68%	6.07%	6.90%	3.32%	4.77%	5.62%

Frequently Asked Questions

Can I hold both VGSTX and REPX in my portfolio?

VGSTX and REPX have a correlation of -0.01, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VGSTX or REPX?

REPX has higher volatility (21.53%) compared to VGSTX (2.53%). In terms of maximum drawdown, VGSTX dropped -38.62% vs REPX's -99.74%.

Which has better risk-adjusted returns?

VGSTX currently has the higher Sharpe Ratio (2.09 vs 1.00), 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.