FUMIX vs. AMRGX

Last updated Apr 1, 2026

Compare and contrast key facts about Fidelity SAI U.S. Momentum Index Fund (FUMIX) and American Growth Fund Series One (AMRGX).

FUMIX is managed by Fidelity. It was launched on Feb 9, 2017. AMRGX is managed by American Growth. It was launched on Jul 31, 1958.

Performance

FUMIX vs. AMRGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI U.S. Momentum Index Fund (FUMIX) and American Growth Fund Series One (AMRGX). The values are adjusted to include any dividend payments, if applicable.

FUMIX vs. AMRGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FUMIX Fidelity SAI U.S. Momentum Index Fund	-7.20%	17.01%	33.39%	14.67%	-15.79%	22.56%	29.92%	24.16%	-1.41%	22.71%
AMRGX American Growth Fund Series One	-1.31%	11.18%	16.61%	24.38%	-19.93%	15.64%	18.65%	36.73%	-9.07%	9.98%

Returns By Period

In the year-to-date period, FUMIX achieves a -7.20% return, which is significantly lower than AMRGX's -1.31% return.

FUMIX

• 1D: -2.00%
• 1M: -9.02%
• YTD: -7.20%
• 6M: -8.78%
• 1Y: 10.91%
• 3Y*: 19.80%
• 5Y*: 11.22%
• 10Y*: —

AMRGX

• 1D: -1.60%
• 1M: -10.92%
• YTD: -1.31%
• 6M: 7.51%
• 1Y: 16.26%
• 3Y*: 14.01%
• 5Y*: 7.34%
• 10Y*: 10.41%

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

FUMIX vs. AMRGX - Expense Ratio Comparison

FUMIX has a 0.11% expense ratio, which is lower than AMRGX's 4.07% expense ratio.

AMRGX

American Growth Fund Series One

FUMIX

Fidelity SAI U.S. Momentum Index Fund

Return for Risk

FUMIX vs. AMRGX — Risk / Return Rank

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

FUMIX

FUMIX Risk / Return Rank: 25
FUMIX Sharpe Ratio Rank: 23
FUMIX Sortino Ratio Rank: 24
FUMIX Omega Ratio Rank: 24
FUMIX Calmar Ratio Rank: 25
FUMIX Martin Ratio Rank: 29

AMRGX

AMRGX Risk / Return Rank: 32
AMRGX Sharpe Ratio Rank: 26
AMRGX Sortino Ratio Rank: 33
AMRGX Omega Ratio Rank: 45
AMRGX Calmar Ratio Rank: 37
AMRGX Martin Ratio Rank: 22

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.

FUMIX vs. AMRGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI U.S. Momentum Index Fund (FUMIX) and American Growth Fund Series One (AMRGX). 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.

	FUMIX	AMRGX	Difference
Sharpe ratio Return per unit of total volatility	0.56	0.62	-0.06
Sortino ratio Return per unit of downside risk	0.91	1.12	-0.21
Omega ratio Gain probability vs. loss probability	1.13	1.19	-0.06
Calmar ratio Return relative to maximum drawdown	0.71	0.99	-0.28
Martin ratio Return relative to average drawdown	3.07	2.37	+0.70
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FUMIX vs. AMRGX - Sharpe Ratio Comparison

The current FUMIX Sharpe Ratio is 0.56, which is comparable to the AMRGX Sharpe Ratio of 0.62. The chart below compares the historical Sharpe Ratios of FUMIX and AMRGX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	FUMIX	AMRGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.56	0.62	-0.06
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.54	0.34	+0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.49	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.10	+0.56

Correlation

The correlation between FUMIX and AMRGX is 0.80, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

FUMIX vs. AMRGX - Dividend Comparison

FUMIX's dividend yield for the trailing twelve months is around 2.99%, less than AMRGX's 18.06% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FUMIX Fidelity SAI U.S. Momentum Index Fund	2.99%	2.77%	5.89%	18.09%	2.10%	20.67%	8.68%	2.09%	3.84%	0.88%
AMRGX American Growth Fund Series One	18.06%	17.82%	12.39%	8.17%	7.77%	12.21%	2.36%	0.00%	0.00%	0.00%

Drawdowns

FUMIX vs. AMRGX - Drawdown Comparison

The maximum FUMIX drawdown since its inception was -33.36%, smaller than the maximum AMRGX drawdown of -80.32%. Use the drawdown chart below to compare losses from any high point for FUMIX and AMRGX.

Drawdown Indicators

	FUMIX	AMRGX	Difference
Max Drawdown Largest peak-to-trough decline	-33.36%	-80.32%	+46.96%
Max Drawdown (1Y) Largest decline over 1 year	-12.12%	-13.98%	+1.86%
Max Drawdown (5Y) Largest decline over 5 years	-27.66%	-35.42%	+7.76%
Max Drawdown (10Y) Largest decline over 10 years	—	-35.42%	—
Current Drawdown Current decline from peak	-10.99%	-13.98%	+2.99%
Average Drawdown Average peak-to-trough decline	-6.42%	-40.45%	+34.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.79%	5.82%	-3.03%

Volatility

FUMIX vs. AMRGX - Volatility Comparison

Fidelity SAI U.S. Momentum Index Fund (FUMIX) has a higher volatility of 6.76% compared to American Growth Fund Series One (AMRGX) at 6.18%. This indicates that FUMIX's price experiences larger fluctuations and is considered to be riskier than AMRGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FUMIX	AMRGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.76%	6.18%	+0.58%
Volatility (6M) Calculated over the trailing 6-month period	12.58%	23.49%	-10.91%
Volatility (1Y) Calculated over the trailing 1-year period	20.98%	28.26%	-7.28%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.98%	21.84%	-0.86%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.72%	21.30%	+0.42%