SIMYX vs. WBIGX

Last updated Jun 3, 2026

SIMYX (SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund) and WBIGX (William Blair International Growth Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, SIMYX returned 8.07%/yr vs 2.75%/yr for WBIGX. A 0.73 correlation means they provide meaningful diversification when combined. SIMYX charges 0.86%/yr vs 1.31%/yr for WBIGX.

Performance

SIMYX vs. WBIGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund (SIMYX) and William Blair International Growth Fund (WBIGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SIMYX achieves a 6.18% return, which is significantly lower than WBIGX's 14.85% return.

SIMYX

• 1D: -0.97%
• 1M: -1.38%
• YTD: 6.18%
• 6M: 8.53%
• 1Y: 15.17%
• 3Y*: 16.20%
• 5Y*: 8.07%
• 10Y*: —

WBIGX

• 1D: -0.50%
• 1M: 5.93%
• YTD: 14.85%
• 6M: 17.76%
• 1Y: 22.95%
• 3Y*: 13.15%
• 5Y*: 2.75%
• 10Y*: 8.21%

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

SIMYX vs. WBIGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SIMYX SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund	6.18%	30.07%	6.26%	13.11%	-11.38%	7.83%	-1.33%	15.77%	-12.11%	21.58%
WBIGX William Blair International Growth Fund	14.85%	17.90%	2.11%	15.16%	-28.65%	8.61%	31.66%	30.25%	-17.99%	28.89%

Correlation

The correlation between SIMYX and WBIGX is 0.65, 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	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.68
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (All Time) Calculated using the full available price history since Jan 4, 2017	0.73

The correlation between SIMYX and WBIGX has been stable across timeframes, ranging from 0.65 to 0.73 - a consistent structural relationship.

Return for Risk

SIMYX vs. WBIGX — Risk / Return Rank

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

SIMYX

SIMYX Risk / Return Rank: 29
SIMYX Sharpe Ratio Rank: 30
SIMYX Sortino Ratio Rank: 31
SIMYX Omega Ratio Rank: 30
SIMYX Calmar Ratio Rank: 26
SIMYX Martin Ratio Rank: 27

WBIGX

WBIGX Risk / Return Rank: 28
WBIGX Sharpe Ratio Rank: 30
WBIGX Sortino Ratio Rank: 28
WBIGX Omega Ratio Rank: 33
WBIGX Calmar Ratio Rank: 23
WBIGX Martin Ratio Rank: 28

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.

SIMYX vs. WBIGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund (SIMYX) and William Blair International Growth Fund (WBIGX). 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.

	SIMYX	WBIGX	Difference
Sharpe ratio Return per unit of total volatility	1.60	1.58	+0.02
Sortino ratio Return per unit of downside risk	2.33	2.21	+0.12
Omega ratio Gain probability vs. loss probability	1.29	1.31	-0.02
Calmar ratio Return relative to maximum drawdown	1.94	1.80	+0.15
Martin ratio Return relative to average drawdown	6.62	6.79	-0.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SIMYX vs. WBIGX - Sharpe Ratio Comparison

The current SIMYX Sharpe Ratio is 1.60, which is comparable to the WBIGX Sharpe Ratio of 1.58. The chart below compares the historical Sharpe Ratios of SIMYX and WBIGX, 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

	SIMYX	WBIGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.60	1.58	+0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.17	+0.54
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.48	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.51	+0.09

Drawdowns

SIMYX vs. WBIGX - Drawdown Comparison

The maximum SIMYX drawdown since its inception was -32.14%, smaller than the maximum WBIGX drawdown of -65.35%. Use the drawdown chart below to compare losses from any high point for SIMYX and WBIGX.

Drawdown Indicators

	SIMYX	WBIGX	Difference
Max Drawdown Largest peak-to-trough decline	-32.14%	-65.35%	+33.21%
Max Drawdown (1Y) Largest decline over 1 year	-8.55%	-13.23%	+4.68%
Max Drawdown (3Y) Largest decline over 3 years	-9.47%	-17.22%	+7.75%
Max Drawdown (5Y) Largest decline over 5 years	-25.06%	-41.18%	+16.12%
Max Drawdown (10Y) Largest decline over 10 years	—	-41.18%	—
Current Drawdown Current decline from peak	-4.81%	-0.50%	-4.31%
Average Drawdown Average peak-to-trough decline	-6.09%	-14.76%	+8.67%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.51%	3.51%	-1.00%

Volatility

SIMYX vs. WBIGX - Volatility Comparison

The current volatility for SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund (SIMYX) is 2.71%, while William Blair International Growth Fund (WBIGX) has a volatility of 5.45%. This indicates that SIMYX experiences smaller price fluctuations and is considered to be less risky than WBIGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SIMYX	WBIGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.71%	5.45%	-2.74%
Volatility (6M) Calculated over the trailing 6-month period	8.27%	12.81%	-4.54%
Volatility (1Y) Calculated over the trailing 1-year period	10.23%	15.09%	-4.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.41%	16.69%	-5.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.24%	17.23%	-4.99%

SIMYX vs. WBIGX - Expense Ratio Comparison

SIMYX has a 0.86% expense ratio, which is lower than WBIGX's 1.31% expense ratio.

Dividends

SIMYX vs. WBIGX - Dividend Comparison

SIMYX's dividend yield for the trailing twelve months is around 2.95%, less than WBIGX's 16.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SIMYX SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund	2.95%	3.13%	5.26%	3.62%	3.13%	3.41%	1.96%	3.09%	3.01%	2.74%	0.00%	0.00%
WBIGX William Blair International Growth Fund	16.52%	18.97%	7.47%	3.38%	7.92%	11.75%	0.82%	1.07%	8.56%	1.28%	1.51%	0.92%

Frequently Asked Questions

Can I hold both SIMYX and WBIGX in my portfolio?

SIMYX and WBIGX have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SIMYX or WBIGX?

WBIGX has higher volatility (5.45%) compared to SIMYX (2.71%). In terms of maximum drawdown, SIMYX dropped -32.14% vs WBIGX's -65.35%.

Which has better risk-adjusted returns?

SIMYX currently has the higher Sharpe Ratio (1.60 vs 1.58), 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.