MTMIX vs. TGRNX

Last updated Jun 5, 2026

MTMIX (MainStay MacKay Total Return Bond Fund) and TGRNX (TIAA-CREF Green Bond Fund) are both Intermediate Core-Plus Bond funds. Over the past 5 years, MTMIX returned 0.91%/yr vs 0.32%/yr for TGRNX. Their correlation of 0.91 suggests significant overlap in exposure. Both charge a 0.45% expense ratio.

Performance

MTMIX vs. TGRNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MainStay MacKay Total Return Bond Fund (MTMIX) 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, MTMIX achieves a 0.59% return, which is significantly higher than TGRNX's 0.46% return.

MTMIX

• 1D: -0.22%
• 1M: 0.09%
• YTD: 0.59%
• 6M: 0.67%
• 1Y: 4.87%
• 3Y*: 6.02%
• 5Y*: 0.91%
• 10Y*: 2.51%

TGRNX

• 1D: -0.22%
• 1M: 0.25%
• YTD: 0.46%
• 6M: 0.70%
• 1Y: 4.70%
• 3Y*: 4.57%
• 5Y*: 0.32%
• 10Y*: —

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

MTMIX vs. TGRNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
MTMIX MainStay MacKay Total Return Bond Fund	0.59%	7.83%	4.76%	7.92%	-15.29%	-0.81%	9.72%	9.38%	1.33%
TGRNX TIAA-CREF Green Bond Fund	0.46%	6.76%	3.08%	5.73%	-13.43%	-0.60%	8.57%	9.15%	1.43%

Correlation

The correlation between MTMIX and TGRNX is 0.87, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (All Time) Calculated using the full available price history since Nov 19, 2018	0.91

The correlation between MTMIX and TGRNX has been stable across timeframes, ranging from 0.87 to 0.93 - a consistent structural relationship.

Return for Risk

MTMIX vs. TGRNX — Risk / Return Rank

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

MTMIX

MTMIX Risk / Return Rank: 27
MTMIX Sharpe Ratio Rank: 26
MTMIX Sortino Ratio Rank: 27
MTMIX Omega Ratio Rank: 26
MTMIX Calmar Ratio Rank: 31
MTMIX Martin Ratio Rank: 26

TGRNX

TGRNX Risk / Return Rank: 35
TGRNX Sharpe Ratio Rank: 34
TGRNX Sortino Ratio Rank: 39
TGRNX Omega Ratio Rank: 36
TGRNX Calmar Ratio Rank: 33
TGRNX Martin Ratio Rank: 30

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.

MTMIX vs. TGRNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MainStay MacKay Total Return Bond Fund (MTMIX) 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.

	MTMIX	TGRNX	Difference
Sharpe ratio: Return per unit of total volatility	1.42	1.66	-0.24
Sortino ratio: Return per unit of downside risk	2.11	2.57	-0.45
Omega ratio: Gain probability vs. loss probability	1.26	1.31	-0.06
Calmar ratio: Return relative to maximum drawdown	2.04	2.11	-0.07
Martin ratio: Return relative to average drawdown	6.06	6.89	-0.83
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MTMIX vs. TGRNX - Sharpe Ratio Comparison

The current MTMIX Sharpe Ratio is 1.42, which is comparable to the TGRNX Sharpe Ratio of 1.66. The chart below compares the historical Sharpe Ratios of MTMIX 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

	MTMIX	TGRNX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.42	1.66	-0.24
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.15	0.07	+0.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.50	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.07	0.53	+0.54

Drawdowns

MTMIX vs. TGRNX - Drawdown Comparison

The maximum MTMIX drawdown since its inception was -20.47%, which is greater than TGRNX's maximum drawdown of -17.85%. Use the drawdown chart below to compare losses from any high point for MTMIX and TGRNX.

Drawdown Indicators

	MTMIX	TGRNX	Difference
Max Drawdown Largest peak-to-trough decline	-20.47%	-17.85%	-2.62%
Max Drawdown (1Y) Largest decline over 1 year	-2.70%	-2.47%	-0.23%
Max Drawdown (3Y) Largest decline over 3 years	-6.14%	-3.99%	-2.15%
Max Drawdown (5Y) Largest decline over 5 years	-20.47%	-17.85%	-2.62%
Max Drawdown (10Y) Largest decline over 10 years	-20.47%	—	—
Current Drawdown Current decline from peak	-1.54%	-0.99%	-0.55%
Average Drawdown Average peak-to-trough decline	-2.28%	-5.22%	+2.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.90%	0.75%	+0.15%

Volatility

MTMIX vs. TGRNX - Volatility Comparison

MainStay MacKay Total Return Bond Fund (MTMIX) has a higher volatility of 1.27% compared to TIAA-CREF Green Bond Fund (TGRNX) at 1.06%. This indicates that MTMIX's price experiences larger fluctuations and is considered to be riskier than TGRNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MTMIX	TGRNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.27%	1.06%	+0.21%
Volatility (6M) Calculated over the trailing 6-month period	2.68%	2.31%	+0.37%
Volatility (1Y) Calculated over the trailing 1-year period	3.87%	3.15%	+0.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.05%	4.84%	+1.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.00%	4.82%	+0.18%

MTMIX vs. TGRNX - Expense Ratio Comparison

Both MTMIX and TGRNX have an expense ratio of 0.45%.

Dividends

MTMIX vs. TGRNX - Dividend Comparison

MTMIX's dividend yield for the trailing twelve months is around 4.93%, more than TGRNX's 4.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MTMIX MainStay MacKay Total Return Bond Fund	4.93%	5.01%	5.47%	4.38%	3.89%	5.43%	3.58%	2.84%	2.82%	2.62%	2.98%	3.12%
TGRNX TIAA-CREF Green Bond Fund	4.30%	4.31%	4.48%	3.30%	2.69%	2.76%	4.20%	4.38%	0.43%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MTMIX and TGRNX in my portfolio?

MTMIX and TGRNX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MTMIX or TGRNX?

MTMIX has higher volatility (1.27%) compared to TGRNX (1.06%). In terms of maximum drawdown, MTMIX dropped -20.47% vs TGRNX's -17.85%.

Which has better risk-adjusted returns?

TGRNX currently has the higher Sharpe Ratio (1.66 vs 1.42), 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.