MTMIX vs. SEATX

Last updated Jun 24, 2026

MTMIX (MainStay MacKay Total Return Bond Fund) and SEATX (SEI Tax Exempt Trust Tax-Advantaged Income Fund) are both Intermediate Core-Plus Bond funds. Over the past 10 years, MTMIX returned 2.48%/yr vs 2.69%/yr for SEATX. At a 0.38 correlation, their price movements are largely independent. MTMIX charges 0.45%/yr vs 0.86%/yr for SEATX.

Performance

MTMIX vs. SEATX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MainStay MacKay Total Return Bond Fund (MTMIX) and SEI Tax Exempt Trust Tax-Advantaged Income Fund (SEATX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MTMIX achieves a 0.70% return, which is significantly lower than SEATX's 2.21% return. Over the past 10 years, MTMIX has underperformed SEATX with an annualized return of 2.48%, while SEATX has yielded a comparatively higher 2.69% annualized return.

MTMIX

• 1D: -0.22%
• 1M: 0.64%
• YTD: 0.70%
• 6M: 0.81%
• 1Y: 4.53%
• 3Y*: 5.98%
• 5Y*: 0.86%
• 10Y*: 2.48%

SEATX

• 1D: -0.11%
• 1M: 1.38%
• YTD: 2.21%
• 6M: 2.65%
• 1Y: 5.28%
• 3Y*: 4.52%
• 5Y*: 0.37%
• 10Y*: 2.69%

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

MTMIX vs. SEATX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MTMIX MainStay MacKay Total Return Bond Fund	0.70%	7.83%	4.76%	7.92%	-15.29%	-0.81%	9.72%	9.38%	-1.22%	4.64%
SEATX SEI Tax Exempt Trust Tax-Advantaged Income Fund	2.21%	2.12%	5.75%	5.57%	-13.10%	4.00%	6.20%	10.58%	0.56%	8.54%

Correlation

The correlation between MTMIX and SEATX is 0.57, 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	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.62
Correlation (5Y) Calculated over the trailing 5-year period	0.57
Correlation (10Y) Calculated over the trailing 10-year period	0.53
Correlation (All Time) Calculated using the full available price history since Jan 2, 2008	0.38

The correlation between MTMIX and SEATX shifts across timeframes, from 0.38 (all time) to 0.62 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

MTMIX vs. SEATX — Risk / Return Rank

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

MTMIX

MTMIX Risk / Return Rank: 23
MTMIX Sharpe Ratio Rank: 23
MTMIX Sortino Ratio Rank: 24
MTMIX Omega Ratio Rank: 22
MTMIX Calmar Ratio Rank: 26
MTMIX Martin Ratio Rank: 22

SEATX

SEATX Risk / Return Rank: 46
SEATX Sharpe Ratio Rank: 44
SEATX Sortino Ratio Rank: 57
SEATX Omega Ratio Rank: 63
SEATX Calmar Ratio Rank: 30
SEATX Martin Ratio Rank: 34

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. SEATX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MainStay MacKay Total Return Bond Fund (MTMIX) and SEI Tax Exempt Trust Tax-Advantaged Income Fund (SEATX). 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.

	MTMIX	SEATX	Difference
Sharpe ratio: Return per unit of total volatility	1.26	1.80	-0.54
Sortino ratio: Return per unit of downside risk	1.89	2.91	-1.03
Omega ratio: Gain probability vs. loss probability	1.23	1.40	-0.18
Calmar ratio: Return relative to maximum drawdown	1.78	1.92	-0.14
Martin ratio: Return relative to average drawdown	5.00	7.13	-2.12

MTMIX vs. SEATX - Sharpe Ratio Comparison

The current MTMIX Sharpe Ratio is 1.26, which is comparable to the SEATX Sharpe Ratio of 1.80. The chart below compares the historical Sharpe Ratios of MTMIX and SEATX, 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

MTMIX vs. SEATX - Drawdown Comparison

The maximum MTMIX drawdown since its inception was -20.47%, smaller than the maximum SEATX drawdown of -28.46%. Use the drawdown chart below to compare losses from any high point for MTMIX and SEATX.

Drawdown Indicators

	MTMIX	SEATX	Difference
Max Drawdown Largest peak-to-trough decline	-20.47%	-28.46%	+7.99%
Max Drawdown (1Y) Largest decline over 1 year	-2.70%	-2.84%	+0.14%
Max Drawdown (3Y) Largest decline over 3 years	-6.14%	-6.80%	+0.66%
Max Drawdown (5Y) Largest decline over 5 years	-20.47%	-17.71%	-2.76%
Max Drawdown (10Y) Largest decline over 10 years	-20.47%	-17.71%	-2.76%
Current Drawdown Current decline from peak	-1.43%	-0.11%	-1.32%
Average Drawdown Average peak-to-trough decline	-2.28%	-3.48%	+1.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.95%	0.76%	+0.19%

Volatility

MTMIX vs. SEATX - Volatility Comparison

MainStay MacKay Total Return Bond Fund (MTMIX) has a higher volatility of 1.03% compared to SEI Tax Exempt Trust Tax-Advantaged Income Fund (SEATX) at 0.82%. This indicates that MTMIX's price experiences larger fluctuations and is considered to be riskier than SEATX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MTMIX	SEATX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.03%	0.82%	+0.21%
Volatility (6M) Calculated over the trailing 6-month period	2.75%	2.27%	+0.48%
Volatility (1Y) Calculated over the trailing 1-year period	3.80%	3.02%	+0.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.06%	4.29%	+1.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.01%	4.57%	+0.44%

MTMIX vs. SEATX - Expense Ratio Comparison

MTMIX has a 0.45% expense ratio, which is lower than SEATX's 0.86% expense ratio.

Dividends

MTMIX vs. SEATX - Dividend Comparison

MTMIX's dividend yield for the trailing twelve months is around 4.92%, more than SEATX's 4.68% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MTMIX MainStay MacKay Total Return Bond Fund	4.92%	5.01%	5.47%	4.38%	3.89%	5.43%	3.58%	2.84%	2.82%	2.62%	2.98%	3.12%
SEATX SEI Tax Exempt Trust Tax-Advantaged Income Fund	4.68%	4.52%	4.63%	3.38%	3.16%	3.37%	4.28%	5.63%	4.76%	4.65%	4.10%	4.25%

Frequently Asked Questions

Can I hold both MTMIX and SEATX in my portfolio?

MTMIX and SEATX have a correlation of 0.57, 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 SEATX?

MTMIX has higher volatility (1.03%) compared to SEATX (0.82%). In terms of maximum drawdown, MTMIX dropped -20.47% vs SEATX's -28.46%.

Which has better risk-adjusted returns?

SEATX currently has the higher Sharpe Ratio (1.80 vs 1.26), 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.