TWIEX vs. SIMYX

Last updated Jun 3, 2026

TWIEX (American Century International Growth Fund) and SIMYX (SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, TWIEX returned 0.57%/yr vs 8.07%/yr for SIMYX. A 0.75 correlation means they provide meaningful diversification when combined. TWIEX charges 1.36%/yr vs 0.86%/yr for SIMYX.

Performance

TWIEX vs. SIMYX - Performance Comparison

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

Returns By Period

In the year-to-date period, TWIEX achieves a 2.40% return, which is significantly lower than SIMYX's 6.18% return.

TWIEX

• 1D: 0.00%
• 1M: 2.33%
• YTD: 2.40%
• 6M: 3.46%
• 1Y: 3.97%
• 3Y*: 6.73%
• 5Y*: 0.57%
• 10Y*: 6.72%

SIMYX

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

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

TWIEX vs. SIMYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TWIEX American Century International Growth Fund	2.40%	15.58%	2.31%	12.31%	-24.98%	8.61%	25.59%	28.37%	-14.44%	30.55%
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%

Correlation

The correlation between TWIEX and SIMYX is 0.72, 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	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.74
Correlation (All Time) Calculated using the full available price history since Jan 4, 2017	0.75

The correlation between TWIEX and SIMYX has been stable across timeframes, ranging from 0.69 to 0.75 - a consistent structural relationship.

Return for Risk

TWIEX vs. SIMYX — Risk / Return Rank

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

TWIEX

TWIEX Risk / Return Rank: 5
TWIEX Sharpe Ratio Rank: 4
TWIEX Sortino Ratio Rank: 4
TWIEX Omega Ratio Rank: 4
TWIEX Calmar Ratio Rank: 5
TWIEX Martin Ratio Rank: 5

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

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.

TWIEX vs. SIMYX - Risk-Adjusted Trends Comparison

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

	TWIEX	SIMYX	Difference
Sharpe ratio Return per unit of total volatility	0.32	1.60	-1.28
Sortino ratio Return per unit of downside risk	0.55	2.33	-1.78
Omega ratio Gain probability vs. loss probability	1.07	1.29	-0.22
Calmar ratio Return relative to maximum drawdown	0.41	1.94	-1.53
Martin ratio Return relative to average drawdown	1.41	6.62	-5.21
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TWIEX vs. SIMYX - Sharpe Ratio Comparison

The current TWIEX Sharpe Ratio is 0.32, which is lower than the SIMYX Sharpe Ratio of 1.60. The chart below compares the historical Sharpe Ratios of TWIEX and SIMYX, 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

	TWIEX	SIMYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.32	1.60	-1.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.03	0.71	-0.68
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.37	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.60	-0.21

Drawdowns

TWIEX vs. SIMYX - Drawdown Comparison

The maximum TWIEX drawdown since its inception was -62.43%, which is greater than SIMYX's maximum drawdown of -32.14%. Use the drawdown chart below to compare losses from any high point for TWIEX and SIMYX.

Drawdown Indicators

	TWIEX	SIMYX	Difference
Max Drawdown Largest peak-to-trough decline	-62.43%	-32.14%	-30.29%
Max Drawdown (1Y) Largest decline over 1 year	-13.04%	-8.55%	-4.49%
Max Drawdown (3Y) Largest decline over 3 years	-17.41%	-9.47%	-7.94%
Max Drawdown (5Y) Largest decline over 5 years	-38.76%	-25.06%	-13.70%
Max Drawdown (10Y) Largest decline over 10 years	-38.76%	—	—
Current Drawdown Current decline from peak	-2.83%	-4.81%	+1.98%
Average Drawdown Average peak-to-trough decline	-16.65%	-6.09%	-10.56%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.84%	2.51%	+1.33%

Volatility

TWIEX vs. SIMYX - Volatility Comparison

American Century International Growth Fund (TWIEX) has a higher volatility of 5.49% compared to SEI Institutional Managed Trust Tax-Managed International Managed Volatility Fund (SIMYX) at 2.71%. This indicates that TWIEX's price experiences larger fluctuations and is considered to be riskier than SIMYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TWIEX	SIMYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.49%	2.71%	+2.78%
Volatility (6M) Calculated over the trailing 6-month period	13.41%	8.27%	+5.14%
Volatility (1Y) Calculated over the trailing 1-year period	16.27%	10.23%	+6.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.25%	11.41%	+6.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.19%	12.24%	+5.95%

TWIEX vs. SIMYX - Expense Ratio Comparison

TWIEX has a 1.36% expense ratio, which is higher than SIMYX's 0.86% expense ratio.

Dividends

TWIEX vs. SIMYX - Dividend Comparison

TWIEX's dividend yield for the trailing twelve months is around 3.23%, more than SIMYX's 2.95% 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%
TWIEX American Century International Growth Fund	3.23%	3.31%	1.01%	0.00%	2.89%	12.00%	4.48%	0.37%	13.87%	5.31%	0.49%	5.66%

Frequently Asked Questions

Can I hold both TWIEX and SIMYX in my portfolio?

TWIEX and SIMYX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TWIEX or SIMYX?

TWIEX has higher volatility (5.49%) compared to SIMYX (2.71%). In terms of maximum drawdown, TWIEX dropped -62.43% vs SIMYX's -32.14%.

Which has better risk-adjusted returns?

SIMYX currently has the higher Sharpe Ratio (1.60 vs 0.32), 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.