YACKX vs. TMMAX

Last updated Jun 24, 2026

YACKX (AMG Yacktman Fund) and TMMAX (SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund) are both Large Cap Value Equities funds. Over the past 10 years, YACKX returned 12.37%/yr vs 9.84%/yr for TMMAX. Their correlation of 0.83 suggests significant overlap in exposure. YACKX charges 0.71%/yr vs 1.00%/yr for TMMAX.

Performance

YACKX vs. TMMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG Yacktman Fund (YACKX) and SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund (TMMAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, YACKX achieves a 14.69% return, which is significantly higher than TMMAX's 1.88% return. Over the past 10 years, YACKX has outperformed TMMAX with an annualized return of 12.37%, while TMMAX has yielded a comparatively lower 9.84% annualized return.

YACKX

• 1D: -0.88%
• 1M: -1.07%
• YTD: 14.69%
• 6M: 16.07%
• 1Y: 9.89%
• 3Y*: 13.66%
• 5Y*: 8.13%
• 10Y*: 12.37%

TMMAX

• 1D: -0.26%
• 1M: -3.35%
• YTD: 1.88%
• 6M: 1.20%
• 1Y: 7.24%
• 3Y*: 11.54%
• 5Y*: 9.25%
• 10Y*: 9.84%

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

YACKX vs. TMMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
YACKX AMG Yacktman Fund	14.69%	1.34%	13.15%	15.46%	-7.50%	19.66%	15.25%	27.49%	2.79%	18.25%
TMMAX SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund	1.88%	11.03%	17.07%	7.32%	-3.11%	24.10%	1.32%	24.00%	-2.84%	15.19%

Correlation

The correlation between YACKX and TMMAX is 0.45, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.45
Correlation (3Y) Calculated over the trailing 3-year period	0.63
Correlation (5Y) Calculated over the trailing 5-year period	0.71
Correlation (10Y) Calculated over the trailing 10-year period	0.75
Correlation (All Time) Calculated using the full available price history since Dec 21, 2007	0.83

Over the past year, the correlation between YACKX and TMMAX has dropped to 0.45 - well below their long-term average of 0.83, suggesting their price drivers have been diverging.

Return for Risk

YACKX vs. TMMAX — Risk / Return Rank

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

YACKX

YACKX Risk / Return Rank: 8
YACKX Sharpe Ratio Rank: 7
YACKX Sortino Ratio Rank: 6
YACKX Omega Ratio Rank: 12
YACKX Calmar Ratio Rank: 7
YACKX Martin Ratio Rank: 7

TMMAX

TMMAX Risk / Return Rank: 16
TMMAX Sharpe Ratio Rank: 14
TMMAX Sortino Ratio Rank: 14
TMMAX Omega Ratio Rank: 13
TMMAX Calmar Ratio Rank: 18
TMMAX Martin Ratio Rank: 21

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.

YACKX vs. TMMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG Yacktman Fund (YACKX) and SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund (TMMAX). 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.

	YACKX	TMMAX	Difference
Sharpe ratio: Return per unit of total volatility	0.50	0.99	-0.49
Sortino ratio: Return per unit of downside risk	0.64	1.45	-0.81
Omega ratio: Gain probability vs. loss probability	1.16	1.17	-0.01
Calmar ratio: Return relative to maximum drawdown	0.60	1.43	-0.83
Martin ratio: Return relative to average drawdown	1.73	4.88	-3.15

YACKX vs. TMMAX - Sharpe Ratio Comparison

The current YACKX Sharpe Ratio is 0.50, which is lower than the TMMAX Sharpe Ratio of 0.99. The chart below compares the historical Sharpe Ratios of YACKX and TMMAX, 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

YACKX vs. TMMAX - Drawdown Comparison

The maximum YACKX drawdown since its inception was -46.65%, which is greater than TMMAX's maximum drawdown of -41.50%. Use the drawdown chart below to compare losses from any high point for YACKX and TMMAX.

Drawdown Indicators

	YACKX	TMMAX	Difference
Max Drawdown Largest peak-to-trough decline	-46.65%	-41.50%	-5.15%
Max Drawdown (1Y) Largest decline over 1 year	-16.30%	-5.78%	-10.52%
Max Drawdown (3Y) Largest decline over 3 years	-18.30%	-23.00%	+4.70%
Max Drawdown (5Y) Largest decline over 5 years	-19.86%	-23.00%	+3.14%
Max Drawdown (10Y) Largest decline over 10 years	-30.93%	-33.41%	+2.48%
Current Drawdown Current decline from peak	-4.83%	-9.14%	+4.31%
Average Drawdown Average peak-to-trough decline	-5.27%	-5.57%	+0.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.62%	1.69%	+3.93%

Volatility

YACKX vs. TMMAX - Volatility Comparison

AMG Yacktman Fund (YACKX) has a higher volatility of 4.96% compared to SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund (TMMAX) at 2.57%. This indicates that YACKX's price experiences larger fluctuations and is considered to be riskier than TMMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	YACKX	TMMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.96%	2.57%	+2.39%
Volatility (6M) Calculated over the trailing 6-month period	19.88%	6.11%	+13.77%
Volatility (1Y) Calculated over the trailing 1-year period	19.73%	8.36%	+11.37%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.16%	19.07%	-1.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.19%	17.82%	-1.63%

YACKX vs. TMMAX - Expense Ratio Comparison

YACKX has a 0.71% expense ratio, which is lower than TMMAX's 1.00% expense ratio.

Dividends

YACKX vs. TMMAX - Dividend Comparison

YACKX has not paid dividends to shareholders, while TMMAX's dividend yield for the trailing twelve months is around 24.83%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TMMAX SEI Institutional Managed Trust Tax-Managed Managed Volatility Fund	24.83%	25.19%	23.39%	15.23%	6.54%	4.73%	2.15%	3.67%	4.91%	4.10%	4.17%	5.57%
YACKX AMG Yacktman Fund	0.00%	0.00%	17.32%	4.39%	7.35%	3.72%	10.82%	16.84%	23.06%	10.67%	8.57%	13.66%

Frequently Asked Questions

Can I hold both YACKX and TMMAX in my portfolio?

YACKX and TMMAX have a correlation of 0.45, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, YACKX or TMMAX?

YACKX has higher volatility (4.96%) compared to TMMAX (2.57%). In terms of maximum drawdown, YACKX dropped -46.65% vs TMMAX's -41.50%.

Which has better risk-adjusted returns?

TMMAX currently has the higher Sharpe Ratio (0.99 vs 0.50), 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.