RMTBX vs. AMFIX

Last updated Jun 23, 2026

RMTBX (Aspiriant Risk-Managed Taxable Bond Fund) and AMFIX (AAMA Income Fund) are both Intermediate Core-Plus Bond funds. Over the past 5 years, RMTBX returned 0.55%/yr vs 0.78%/yr for AMFIX. A 0.74 correlation means they provide meaningful diversification when combined. RMTBX charges 0.69%/yr vs 0.92%/yr for AMFIX.

Performance

RMTBX vs. AMFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Aspiriant Risk-Managed Taxable Bond Fund (RMTBX) and AAMA Income Fund (AMFIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RMTBX achieves a 0.12% return, which is significantly lower than AMFIX's 0.30% return.

RMTBX

• 1D: 0.23%
• 1M: 1.05%
• YTD: 0.12%
• 6M: 0.27%
• 1Y: 4.98%
• 3Y*: 4.10%
• 5Y*: 0.55%
• 10Y*: —

AMFIX

• 1D: 0.12%
• 1M: 0.21%
• YTD: 0.30%
• 6M: 0.40%
• 1Y: 2.31%
• 3Y*: 3.32%
• 5Y*: 0.78%
• 10Y*: —

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

RMTBX vs. AMFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
RMTBX Aspiriant Risk-Managed Taxable Bond Fund	0.12%	7.25%	0.54%	7.76%	-11.67%	-0.57%	6.63%	7.63%	0.91%
AMFIX AAMA Income Fund	0.30%	3.74%	3.48%	3.84%	-6.26%	-1.37%	2.24%	2.47%	1.25%

Correlation

The correlation between RMTBX and AMFIX is 0.76, 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	0.76
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (All Time) Calculated using the full available price history since Mar 29, 2018	0.74

The correlation between RMTBX and AMFIX has been stable across timeframes, ranging from 0.74 to 0.78 - a consistent structural relationship.

Return for Risk

RMTBX vs. AMFIX — Risk / Return Rank

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

RMTBX

RMTBX Risk / Return Rank: 22
RMTBX Sharpe Ratio Rank: 26
RMTBX Sortino Ratio Rank: 24
RMTBX Omega Ratio Rank: 28
RMTBX Calmar Ratio Rank: 18
RMTBX Martin Ratio Rank: 16

AMFIX

AMFIX Risk / Return Rank: 67
AMFIX Sharpe Ratio Rank: 63
AMFIX Sortino Ratio Rank: 73
AMFIX Omega Ratio Rank: 75
AMFIX Calmar Ratio Rank: 74
AMFIX Martin Ratio Rank: 51

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.

RMTBX vs. AMFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Aspiriant Risk-Managed Taxable Bond Fund (RMTBX) and AAMA Income Fund (AMFIX). 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.

	RMTBX	AMFIX	Difference
Sharpe ratio: Return per unit of total volatility	1.36	2.14	-0.78
Sortino ratio: Return per unit of downside risk	1.93	3.24	-1.31
Omega ratio: Gain probability vs. loss probability	1.26	1.44	-0.18
Calmar ratio: Return relative to maximum drawdown	1.42	3.20	-1.78
Martin ratio: Return relative to average drawdown	3.99	9.90	-5.90

RMTBX vs. AMFIX - Sharpe Ratio Comparison

The current RMTBX Sharpe Ratio is 1.36, which is lower than the AMFIX Sharpe Ratio of 2.14. The chart below compares the historical Sharpe Ratios of RMTBX and AMFIX, 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

RMTBX vs. AMFIX - Drawdown Comparison

The maximum RMTBX drawdown since its inception was -17.19%, which is greater than AMFIX's maximum drawdown of -9.35%. Use the drawdown chart below to compare losses from any high point for RMTBX and AMFIX.

Drawdown Indicators

	RMTBX	AMFIX	Difference
Max Drawdown Largest peak-to-trough decline	-17.19%	-9.35%	-7.84%
Max Drawdown (1Y) Largest decline over 1 year	-3.52%	-0.74%	-2.78%
Max Drawdown (3Y) Largest decline over 3 years	-6.24%	-0.88%	-5.36%
Max Drawdown (5Y) Largest decline over 5 years	-17.19%	-8.91%	-8.28%
Current Drawdown Current decline from peak	-1.82%	-0.39%	-1.43%
Average Drawdown Average peak-to-trough decline	-4.05%	-2.02%	-2.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.25%	0.24%	+1.01%

Volatility

RMTBX vs. AMFIX - Volatility Comparison

Aspiriant Risk-Managed Taxable Bond Fund (RMTBX) has a higher volatility of 1.07% compared to AAMA Income Fund (AMFIX) at 0.46%. This indicates that RMTBX's price experiences larger fluctuations and is considered to be riskier than AMFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RMTBX	AMFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.07%	0.46%	+0.61%
Volatility (6M) Calculated over the trailing 6-month period	2.93%	0.91%	+2.02%
Volatility (1Y) Calculated over the trailing 1-year period	3.67%	1.11%	+2.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.53%	2.17%	+3.36%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.75%	1.74%	+3.01%

RMTBX vs. AMFIX - Expense Ratio Comparison

RMTBX has a 0.69% expense ratio, which is lower than AMFIX's 0.92% expense ratio.

Dividends

RMTBX vs. AMFIX - Dividend Comparison

RMTBX's dividend yield for the trailing twelve months is around 3.33%, more than AMFIX's 2.21% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMFIX AAMA Income Fund	2.21%	2.08%	2.44%	1.70%	0.83%	0.57%	0.83%	1.24%	1.24%	0.40%
RMTBX Aspiriant Risk-Managed Taxable Bond Fund	3.33%	3.34%	3.13%	5.19%	4.47%	4.35%	5.40%	3.38%	2.43%	0.00%

Frequently Asked Questions

Can I hold both RMTBX and AMFIX in my portfolio?

RMTBX and AMFIX have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RMTBX or AMFIX?

RMTBX has higher volatility (1.07%) compared to AMFIX (0.46%). In terms of maximum drawdown, RMTBX dropped -17.19% vs AMFIX's -9.35%.

Which has better risk-adjusted returns?

AMFIX currently has the higher Sharpe Ratio (2.14 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.