RYGRX vs. FUMIX

Last updated Aug 5, 2026

RYGRX (Rydex S&P 500 Pure Growth Fund) and FUMIX (Fidelity SAI U.S. Momentum Index Fund) are both Large Cap Growth Equities funds. Over the past 5 years, RYGRX returned 6.18%/yr vs 14.44%/yr for FUMIX. Their correlation of 0.90 means they have usually moved in the same direction. RYGRX charges 2.26%/yr vs 0.11%/yr for FUMIX.

Performance

RYGRX vs. FUMIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex S&P 500 Pure Growth Fund (RYGRX) and Fidelity SAI U.S. Momentum Index Fund (FUMIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RYGRX achieves a 21.11% return, which is significantly lower than FUMIX's 22.70% return.

RYGRX

• 1D: 2.02%
• 1M: -4.71%
• 6M: 15.07%
• YTD: 21.11%
• 1Y: 19.73%
• 3Y*: 20.46%
• 5Y*: 6.18%
• 10Y*: 11.96%
• ALL TIME*: 9.26%

FUMIX

• 1D: 1.04%
• 1M: -2.34%
• 6M: 19.44%
• YTD: 22.70%
• 1Y: 26.67%
• 3Y*: 28.91%
• 5Y*: 14.44%
• 10Y*: —
• ALL TIME*: 16.99%

*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)
FUMIX Fidelity SAI U.S. Momentum Index Fund	$0.00	$0.00	$0.00
RYGRX Rydex S&P 500 Pure Growth Fund	$0.00	$0.00	$0.00

RYGRX vs. FUMIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYGRX Rydex S&P 500 Pure Growth Fund	21.11%	11.00%	25.73%	5.80%	-28.71%	26.61%	26.34%	34.13%	-6.28%	19.28%
FUMIX Fidelity SAI U.S. Momentum Index Fund	22.70%	17.01%	33.39%	14.67%	-15.79%	22.56%	29.92%	24.16%	-1.41%	22.71%

Correlation

The correlation between RYGRX and FUMIX is 0.90, 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.	0.90
Correlation (3Y) Balances recent behavior with more history.	0.89
Correlation (5Y) Shows whether the relationship held over a longer period.	0.90
Correlation (All Time) Calculated using the full available price history since Feb 9, 2017	0.90

The correlation between RYGRX and FUMIX has been stable across timeframes, ranging from 0.89 to 0.90 - a consistent structural relationship.

Return for Risk

RYGRX vs. FUMIX — Risk / Return Rank

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

RYGRX

RYGRX Risk / Return Rank: 25
RYGRX Sharpe Ratio Rank: 22
RYGRX Sortino Ratio Rank: 23
RYGRX Omega Ratio Rank: 23
RYGRX Calmar Ratio Rank: 26
RYGRX Martin Ratio Rank: 33

FUMIX

FUMIX Risk / Return Rank: 49
FUMIX Sharpe Ratio Rank: 42
FUMIX Sortino Ratio Rank: 41
FUMIX Omega Ratio Rank: 41
FUMIX Calmar Ratio Rank: 59
FUMIX Martin Ratio Rank: 64

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.

RYGRX vs. FUMIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex S&P 500 Pure Growth Fund (RYGRX) and Fidelity SAI U.S. Momentum Index Fund (FUMIX). 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.

	RYGRX	FUMIX	Difference
Sharpe ratio: Return per unit of total volatility	0.89	1.37	-0.48
Sortino ratio: Return per unit of downside risk	1.35	1.94	-0.59
Omega ratio: Gain probability vs. loss probability	1.17	1.25	-0.08
Calmar ratio: Return relative to maximum drawdown	1.30	2.23	-0.94
Martin ratio: Return relative to average drawdown	5.26	8.89	-3.63

RYGRX vs. FUMIX - Sharpe Ratio Comparison

The current RYGRX Sharpe Ratio is 0.89, which is lower than the FUMIX Sharpe Ratio of 1.37. The chart below compares the historical Sharpe Ratios of RYGRX and FUMIX, 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

RYGRX vs. FUMIX - Drawdown Comparison

The maximum RYGRX drawdown since its inception was -54.22%, which is greater than FUMIX's maximum drawdown of -33.36%. Use the drawdown chart below to compare losses from any high point for RYGRX and FUMIX.

Drawdown Indicators

	RYGRX	FUMIX	Difference
Max Drawdown Largest peak-to-trough decline	-54.22%	-33.36%	-20.86%
Max Drawdown (1Y) Largest decline over 1 year	-17.01%	-12.87%	-4.14%
Max Drawdown (3Y) Largest decline over 3 years	-24.95%	-19.90%	-5.05%
Max Drawdown (5Y) Largest decline over 5 years	-36.57%	-27.66%	-8.91%
Max Drawdown (10Y) Largest decline over 10 years	-36.63%	—	—
Current Drawdown Current decline from peak	-10.77%	-7.52%	-3.25%
Average Drawdown Average peak-to-trough decline	-9.38%	-6.28%	-3.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.19%	3.22%	+0.97%

Volatility

RYGRX vs. FUMIX - Volatility Comparison

Rydex S&P 500 Pure Growth Fund (RYGRX) has a higher volatility of 10.44% compared to Fidelity SAI U.S. Momentum Index Fund (FUMIX) at 8.17%. This indicates that RYGRX's price experiences larger fluctuations and is considered to be riskier than FUMIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RYGRX	FUMIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.44%	8.17%	+2.27%
Volatility (6M) Calculated over the trailing 6-month period	22.12%	18.85%	+3.27%
Volatility (1Y) Calculated over the trailing 1-year period	24.91%	21.11%	+3.80%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.48%	21.82%	+2.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.35%	21.98%	+1.37%

RYGRX vs. FUMIX - Expense Ratio Comparison

RYGRX has a 2.26% expense ratio, which is higher than FUMIX's 0.11% expense ratio.

Dividends

RYGRX vs. FUMIX - Dividend Comparison

RYGRX's dividend yield for the trailing twelve months is around 4.20%, more than FUMIX's 2.26% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FUMIX Fidelity SAI U.S. Momentum Index Fund	2.26%	2.77%	5.89%	18.09%	2.10%	20.67%	8.68%	2.09%	3.84%	0.88%	0.00%	0.00%
RYGRX Rydex S&P 500 Pure Growth Fund	4.20%	5.09%	0.00%	0.00%	0.00%	2.81%	4.43%	12.10%	7.15%	6.26%	0.05%	2.96%

Frequently Asked Questions

Can I hold both RYGRX and FUMIX in my portfolio?

With a correlation of 0.90, RYGRX and FUMIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, RYGRX or FUMIX?

RYGRX has higher volatility (10.44%) compared to FUMIX (8.17%). In terms of maximum drawdown, RYGRX dropped -54.22% vs FUMIX's -33.36%.

Which has better risk-adjusted returns?

FUMIX currently has the higher Sharpe Ratio (1.37 vs 0.89), 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.