AMFIX vs. TGRNX

Last updated Jun 4, 2026

AMFIX (AAMA Income Fund) and TGRNX (TIAA-CREF Green Bond Fund) are both Intermediate Core-Plus Bond funds. Over the past 5 years, AMFIX returned 0.75%/yr vs 0.42%/yr for TGRNX. A 0.79 correlation means they provide meaningful diversification when combined. AMFIX charges 0.92%/yr vs 0.45%/yr for TGRNX.

Performance

AMFIX vs. TGRNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AAMA Income Fund (AMFIX) and TIAA-CREF Green Bond Fund (TGRNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMFIX achieves a 0.30% return, which is significantly lower than TGRNX's 0.68% return.

AMFIX

• 1D: 0.00%
• 1M: 0.04%
• YTD: 0.30%
• 6M: 0.48%
• 1Y: 2.53%
• 3Y*: 3.31%
• 5Y*: 0.75%
• 10Y*: —

TGRNX

• 1D: 0.00%
• 1M: 0.58%
• YTD: 0.68%
• 6M: 0.70%
• 1Y: 5.40%
• 3Y*: 4.65%
• 5Y*: 0.42%
• 10Y*: —

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

AMFIX vs. TGRNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
AMFIX AAMA Income Fund	0.30%	3.74%	3.48%	3.84%	-6.26%	-1.37%	2.24%	2.47%	0.72%
TGRNX TIAA-CREF Green Bond Fund	0.68%	6.76%	3.08%	5.73%	-13.43%	-0.60%	8.57%	9.15%	1.43%

Correlation

The correlation between AMFIX and TGRNX 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	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (All Time) Calculated using the full available price history since Nov 19, 2018	0.79

The correlation between AMFIX and TGRNX has been stable across timeframes, ranging from 0.77 to 0.84 - a consistent structural relationship.

Return for Risk

AMFIX vs. TGRNX — Risk / Return Rank

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

AMFIX

AMFIX Risk / Return Rank: 72
AMFIX Sharpe Ratio Rank: 69
AMFIX Sortino Ratio Rank: 80
AMFIX Omega Ratio Rank: 78
AMFIX Calmar Ratio Rank: 76
AMFIX Martin Ratio Rank: 58

TGRNX

TGRNX Risk / Return Rank: 36
TGRNX Sharpe Ratio Rank: 36
TGRNX Sortino Ratio Rank: 41
TGRNX Omega Ratio Rank: 38
TGRNX Calmar Ratio Rank: 34
TGRNX Martin Ratio Rank: 32

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.

AMFIX vs. TGRNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AAMA Income Fund (AMFIX) and TIAA-CREF Green Bond Fund (TGRNX). 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.

	AMFIX	TGRNX	Difference
Sharpe ratio: Return per unit of total volatility	2.43	1.73	+0.70
Sortino ratio: Return per unit of downside risk	3.81	2.69	+1.11
Omega ratio: Gain probability vs. loss probability	1.51	1.33	+0.18
Calmar ratio: Return relative to maximum drawdown	3.43	2.20	+1.23
Martin ratio: Return relative to average drawdown	11.54	7.23	+4.32
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AMFIX vs. TGRNX - Sharpe Ratio Comparison

The current AMFIX Sharpe Ratio is 2.43, which is higher than the TGRNX Sharpe Ratio of 1.73. The chart below compares the historical Sharpe Ratios of AMFIX and TGRNX, 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

	AMFIX	TGRNX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.43	1.73	+0.70
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.35	0.09	+0.26
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.54	+0.02

Drawdowns

AMFIX vs. TGRNX - Drawdown Comparison

The maximum AMFIX drawdown since its inception was -9.35%, smaller than the maximum TGRNX drawdown of -17.85%. Use the drawdown chart below to compare losses from any high point for AMFIX and TGRNX.

Drawdown Indicators

	AMFIX	TGRNX	Difference
Max Drawdown Largest peak-to-trough decline	-9.35%	-17.85%	+8.50%
Max Drawdown (1Y) Largest decline over 1 year	-0.74%	-2.47%	+1.73%
Max Drawdown (3Y) Largest decline over 3 years	-0.88%	-3.99%	+3.11%
Max Drawdown (5Y) Largest decline over 5 years	-8.91%	-17.85%	+8.94%
Current Drawdown Current decline from peak	-0.39%	-0.78%	+0.39%
Average Drawdown Average peak-to-trough decline	-2.03%	-5.23%	+3.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.22%	0.75%	-0.53%

Volatility

AMFIX vs. TGRNX - Volatility Comparison

The current volatility for AAMA Income Fund (AMFIX) is 0.41%, while TIAA-CREF Green Bond Fund (TGRNX) has a volatility of 1.06%. This indicates that AMFIX experiences smaller price fluctuations and is considered to be less risky than TGRNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMFIX	TGRNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.41%	1.06%	-0.65%
Volatility (6M) Calculated over the trailing 6-month period	0.83%	2.31%	-1.48%
Volatility (1Y) Calculated over the trailing 1-year period	1.04%	3.15%	-2.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.17%	4.84%	-2.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.74%	4.82%	-3.08%

AMFIX vs. TGRNX - Expense Ratio Comparison

AMFIX has a 0.92% expense ratio, which is higher than TGRNX's 0.45% expense ratio.

Dividends

AMFIX vs. TGRNX - Dividend Comparison

AMFIX's dividend yield for the trailing twelve months is around 2.21%, less than TGRNX's 4.29% 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%
TGRNX TIAA-CREF Green Bond Fund	4.29%	4.31%	4.48%	3.30%	2.69%	2.76%	4.20%	4.38%	0.43%	0.00%

Frequently Asked Questions

Can I hold both AMFIX and TGRNX in my portfolio?

AMFIX and TGRNX 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, AMFIX or TGRNX?

TGRNX has higher volatility (1.06%) compared to AMFIX (0.41%). In terms of maximum drawdown, AMFIX dropped -9.35% vs TGRNX's -17.85%.

Which has better risk-adjusted returns?

AMFIX currently has the higher Sharpe Ratio (2.43 vs 1.73), 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.