FSKAX vs. FEPI

Last updated Jun 16, 2026

FSKAX (Fidelity Total Market Index Fund) and FEPI (REX FANG & Innovation Equity Premium Income ETF) are both funds - FSKAX is a Large Cap Blend Equities fund managed by Fidelity, while FEPI is a Derivative Income fund actively managed by REX. Over the past year, FSKAX returned 26.33% vs 29.40% for FEPI. Their correlation of 0.82 suggests significant overlap in exposure. FSKAX charges 0.01%/yr vs 0.65%/yr for FEPI.

Performance

FSKAX vs. FEPI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Total Market Index Fund (FSKAX) and REX FANG & Innovation Equity Premium Income ETF (FEPI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSKAX achieves a 9.75% return, which is significantly higher than FEPI's 8.42% return.

FSKAX

• 1D: 0.51%
• 1M: 1.05%
• YTD: 9.75%
• 6M: 10.07%
• 1Y: 26.33%
• 3Y*: 20.67%
• 5Y*: 12.24%
• 10Y*: 14.99%

FEPI

• 1D: 2.85%
• 1M: 1.58%
• YTD: 8.42%
• 6M: 10.88%
• 1Y: 29.40%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

FSKAX vs. FEPI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
FSKAX Fidelity Total Market Index Fund	9.75%	17.06%	23.89%	10.53%
FEPI REX FANG & Innovation Equity Premium Income ETF	8.42%	18.33%	15.69%	11.75%

Correlation

The correlation between FSKAX and FEPI 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 (All Time) Calculated using the full available price history since Oct 11, 2023	0.82

The correlation between FSKAX and FEPI has been stable across timeframes, ranging from 0.78 to 0.82 - a consistent structural relationship.

Return for Risk

FSKAX vs. FEPI — Risk / Return Rank

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

FSKAX

FSKAX Risk / Return Rank: 64
FSKAX Sharpe Ratio Rank: 61
FSKAX Sortino Ratio Rank: 56
FSKAX Omega Ratio Rank: 57
FSKAX Calmar Ratio Rank: 68
FSKAX Martin Ratio Rank: 78

FEPI

FEPI Risk / Return Rank: 53
FEPI Sharpe Ratio Rank: 56
FEPI Sortino Ratio Rank: 51
FEPI Omega Ratio Rank: 56
FEPI Calmar Ratio Rank: 51
FEPI Martin Ratio Rank: 49

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.

FSKAX vs. FEPI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Total Market Index Fund (FSKAX) and REX FANG & Innovation Equity Premium Income ETF (FEPI). 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.

	FSKAX	FEPI	Difference
Sharpe ratio: Return per unit of total volatility	1.95	1.71	+0.24
Sortino ratio: Return per unit of downside risk	2.65	2.28	+0.37
Omega ratio: Gain probability vs. loss probability	1.35	1.31	+0.04
Calmar ratio: Return relative to maximum drawdown	2.80	2.29	+0.51
Martin ratio: Return relative to average drawdown	12.51	7.48	+5.03

FSKAX vs. FEPI - Sharpe Ratio Comparison

The current FSKAX Sharpe Ratio is 1.95, which is comparable to the FEPI Sharpe Ratio of 1.71. The chart below compares the historical Sharpe Ratios of FSKAX and FEPI, 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

FSKAX vs. FEPI - Drawdown Comparison

The maximum FSKAX drawdown since its inception was -35.01%, which is greater than FEPI's maximum drawdown of -23.56%. Use the drawdown chart below to compare losses from any high point for FSKAX and FEPI.

Drawdown Indicators

	FSKAX	FEPI	Difference
Max Drawdown Largest peak-to-trough decline	-35.01%	-23.56%	-11.45%
Max Drawdown (1Y) Largest decline over 1 year	-8.92%	-12.91%	+3.99%
Max Drawdown (3Y) Largest decline over 3 years	-19.43%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-25.39%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-35.01%	—	—
Current Drawdown Current decline from peak	-2.08%	-3.24%	+1.16%
Average Drawdown Average peak-to-trough decline	-4.01%	-3.51%	-0.50%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.99%	3.94%	-1.95%

Volatility

FSKAX vs. FEPI - Volatility Comparison

The current volatility for Fidelity Total Market Index Fund (FSKAX) is 4.64%, while REX FANG & Innovation Equity Premium Income ETF (FEPI) has a volatility of 6.42%. This indicates that FSKAX experiences smaller price fluctuations and is considered to be less risky than FEPI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSKAX	FEPI	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.64%	6.42%	-1.78%
Volatility (6M) Calculated over the trailing 6-month period	9.97%	13.68%	-3.71%
Volatility (1Y) Calculated over the trailing 1-year period	12.79%	17.31%	-4.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.48%	19.19%	-1.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.49%	19.19%	-0.70%

FSKAX vs. FEPI - Expense Ratio Comparison

FSKAX has a 0.02% expense ratio, which is lower than FEPI's 0.65% expense ratio.

Dividends

FSKAX vs. FEPI - Dividend Comparison

FSKAX's dividend yield for the trailing twelve months is around 0.95%, less than FEPI's 24.96% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FEPI REX FANG & Innovation Equity Premium Income ETF	24.96%	25.48%	27.18%	4.21%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FSKAX Fidelity Total Market Index Fund	0.95%	1.01%	1.19%	1.41%	1.62%	1.15%	1.45%	1.94%	2.54%	2.07%	2.43%	0.82%

Frequently Asked Questions

Can I hold both FSKAX and FEPI in my portfolio?

FSKAX and FEPI 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, FSKAX or FEPI?

FEPI has higher volatility (6.42%) compared to FSKAX (4.64%). In terms of maximum drawdown, FSKAX dropped -35.01% vs FEPI's -23.56%.

Which has better risk-adjusted returns?

FSKAX currently has the higher Sharpe Ratio (1.95 vs 1.71), 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.