FEX vs. PRBLX

Last updated Jun 4, 2026

FEX (First Trust Large Cap Core AlphaDEX Fund) and PRBLX (Parnassus Core Equity Fund) are both Large Cap Blend Equities funds. Over the past 10 years, FEX returned 13.11%/yr vs 13.62%/yr for PRBLX. Their correlation of 0.86 suggests significant overlap in exposure. FEX charges 0.57%/yr vs 0.82%/yr for PRBLX.

Performance

FEX vs. PRBLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in First Trust Large Cap Core AlphaDEX Fund (FEX) and Parnassus Core Equity Fund (PRBLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FEX achieves a 15.12% return, which is significantly higher than PRBLX's 6.73% return. Both investments have delivered pretty close results over the past 10 years, with FEX having a 13.11% annualized return and PRBLX not far ahead at 13.62%.

FEX

• 1D: -0.19%
• 1M: 5.13%
• YTD: 15.12%
• 6M: 15.57%
• 1Y: 29.38%
• 3Y*: 20.78%
• 5Y*: 11.10%
• 10Y*: 13.11%

PRBLX

• 1D: 0.10%
• 1M: 4.10%
• YTD: 6.73%
• 6M: 5.90%
• 1Y: 15.02%
• 3Y*: 16.56%
• 5Y*: 10.33%
• 10Y*: 13.62%

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

FEX vs. PRBLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FEX First Trust Large Cap Core AlphaDEX Fund	15.12%	15.05%	17.07%	14.31%	-11.86%	26.83%	14.28%	26.93%	-9.89%	21.41%
PRBLX Parnassus Core Equity Fund	6.73%	11.67%	18.58%	24.97%	-18.64%	27.59%	21.21%	30.68%	-0.30%	16.63%

Correlation

The correlation between FEX and PRBLX is 0.77, 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	0.77
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since May 11, 2007	0.86

The correlation between FEX and PRBLX has been stable across timeframes, ranging from 0.77 to 0.87 - a consistent structural relationship.

Return for Risk

FEX vs. PRBLX — Risk / Return Rank

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

FEX

FEX Risk / Return Rank: 76
FEX Sharpe Ratio Rank: 72
FEX Sortino Ratio Rank: 72
FEX Omega Ratio Rank: 69
FEX Calmar Ratio Rank: 85
FEX Martin Ratio Rank: 84

PRBLX

PRBLX Risk / Return Rank: 20
PRBLX Sharpe Ratio Rank: 23
PRBLX Sortino Ratio Rank: 22
PRBLX Omega Ratio Rank: 21
PRBLX Calmar Ratio Rank: 15
PRBLX Martin Ratio Rank: 20

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.

FEX vs. PRBLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for First Trust Large Cap Core AlphaDEX Fund (FEX) and Parnassus Core Equity Fund (PRBLX). 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.

	FEX	PRBLX	Difference
Sharpe ratio: Return per unit of total volatility	2.36	1.36	+1.01
Sortino ratio: Return per unit of downside risk	3.28	1.94	+1.33
Omega ratio: Gain probability vs. loss probability	1.41	1.24	+0.18
Calmar ratio: Return relative to maximum drawdown	4.74	1.37	+3.36
Martin ratio: Return relative to average drawdown	17.27	5.35	+11.92
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FEX vs. PRBLX - Sharpe Ratio Comparison

The current FEX Sharpe Ratio is 2.36, which is higher than the PRBLX Sharpe Ratio of 1.36. The chart below compares the historical Sharpe Ratios of FEX and PRBLX, 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

	FEX	PRBLX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.36	1.36	+1.01
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.68	0.64	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.71	0.79	-0.08
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.71	-0.24

Drawdowns

FEX vs. PRBLX - Drawdown Comparison

The maximum FEX drawdown since its inception was -58.81%, which is greater than PRBLX's maximum drawdown of -42.20%. Use the drawdown chart below to compare losses from any high point for FEX and PRBLX.

Drawdown Indicators

	FEX	PRBLX	Difference
Max Drawdown Largest peak-to-trough decline	-58.81%	-42.20%	-16.61%
Max Drawdown (1Y) Largest decline over 1 year	-6.23%	-11.63%	+5.40%
Max Drawdown (3Y) Largest decline over 3 years	-19.58%	-16.31%	-3.27%
Max Drawdown (5Y) Largest decline over 5 years	-21.27%	-26.31%	+5.04%
Max Drawdown (10Y) Largest decline over 10 years	-39.51%	-30.09%	-9.42%
Current Drawdown Current decline from peak	-0.19%	0.00%	-0.19%
Average Drawdown Average peak-to-trough decline	-7.89%	-4.05%	-3.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.71%	2.97%	-1.26%

Volatility

FEX vs. PRBLX - Volatility Comparison

First Trust Large Cap Core AlphaDEX Fund (FEX) has a higher volatility of 3.98% compared to Parnassus Core Equity Fund (PRBLX) at 3.03%. This indicates that FEX's price experiences larger fluctuations and is considered to be riskier than PRBLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FEX	PRBLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.98%	3.03%	+0.95%
Volatility (6M) Calculated over the trailing 6-month period	9.17%	9.12%	+0.05%
Volatility (1Y) Calculated over the trailing 1-year period	12.51%	11.78%	+0.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.47%	16.25%	+0.22%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.59%	17.27%	+1.32%

FEX vs. PRBLX - Expense Ratio Comparison

FEX has a 0.57% expense ratio, which is lower than PRBLX's 0.82% expense ratio.

Dividends

FEX vs. PRBLX - Dividend Comparison

FEX's dividend yield for the trailing twelve months is around 0.95%, less than PRBLX's 17.83% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FEX First Trust Large Cap Core AlphaDEX Fund	0.95%	1.10%	1.18%	1.38%	1.61%	0.80%	1.21%	1.32%	1.34%	1.07%	1.29%	1.33%
PRBLX Parnassus Core Equity Fund	17.83%	19.08%	10.00%	6.01%	10.13%	7.77%	5.87%	8.02%	9.64%	7.16%	3.80%	9.62%

Frequently Asked Questions

Can I hold both FEX and PRBLX in my portfolio?

FEX and PRBLX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FEX or PRBLX?

FEX has higher volatility (3.98%) compared to PRBLX (3.03%). In terms of maximum drawdown, FEX dropped -58.81% vs PRBLX's -42.20%.

Which has better risk-adjusted returns?

FEX currently has the higher Sharpe Ratio (2.36 vs 1.36), 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.