TWCGX vs. MGK
Compare and contrast key facts about American Century Growth Fund (TWCGX) and Vanguard Mega Cap Growth ETF (MGK).
TWCGX is managed by American Century. It was launched on Jun 30, 1971. MGK is a passively managed fund by Vanguard that tracks the performance of the CRSP US Mega Cap Growth Index. It was launched on Dec 17, 2007.
Performance
TWCGX vs. MGK - Performance Comparison
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TWCGX vs. MGK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TWCGX American Century Growth Fund | -10.23% | 15.28% | 26.20% | 43.31% | -31.39% | 27.86% | 35.23% | 35.39% | -1.27% | 30.06% |
MGK Vanguard Mega Cap Growth ETF | -9.86% | 20.67% | 32.94% | 51.67% | -33.59% | 28.58% | 41.01% | 37.38% | -2.91% | 29.49% |
Returns By Period
The year-to-date returns for both investments are quite close, with TWCGX having a -10.23% return and MGK slightly higher at -9.86%. Over the past 10 years, TWCGX has underperformed MGK with an annualized return of 14.92%, while MGK has yielded a comparatively higher 16.97% annualized return.
TWCGX
- 1D
- 3.75%
- 1M
- -5.65%
- YTD
- -10.23%
- 6M
- -9.87%
- 1Y
- 15.47%
- 3Y*
- 17.60%
- 5Y*
- 9.71%
- 10Y*
- 14.92%
MGK
- 1D
- 1.17%
- 1M
- -4.13%
- YTD
- -9.86%
- 6M
- -7.94%
- 1Y
- 19.83%
- 3Y*
- 22.59%
- 5Y*
- 12.64%
- 10Y*
- 16.97%
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TWCGX vs. MGK - Expense Ratio Comparison
TWCGX has a 0.94% expense ratio, which is higher than MGK's 0.05% expense ratio.
Return for Risk
TWCGX vs. MGK — Risk / Return Rank
TWCGX
MGK
TWCGX vs. MGK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Growth Fund (TWCGX) and Vanguard Mega Cap Growth ETF (MGK). 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.
| TWCGX | MGK | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.73 | 0.85 | -0.12 |
Sortino ratioReturn per unit of downside risk | 1.21 | 1.39 | -0.17 |
Omega ratioGain probability vs. loss probability | 1.17 | 1.19 | -0.02 |
Calmar ratioReturn relative to maximum drawdown | 0.99 | 1.23 | -0.25 |
Martin ratioReturn relative to average drawdown | 3.39 | 4.27 | -0.88 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| TWCGX | MGK | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.73 | 0.85 | -0.12 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.45 | 0.56 | -0.11 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.70 | 0.78 | -0.08 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.51 | 0.60 | -0.09 |
Correlation
The correlation between TWCGX and MGK is 0.98, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
TWCGX vs. MGK - Dividend Comparison
TWCGX's dividend yield for the trailing twelve months is around 19.09%, more than MGK's 0.39% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
TWCGX American Century Growth Fund | 19.09% | 17.14% | 5.96% | 4.81% | 4.86% | 9.83% | 5.33% | 5.60% | 14.07% | 10.28% | 4.64% | 6.80% |
MGK Vanguard Mega Cap Growth ETF | 0.39% | 0.35% | 0.43% | 0.50% | 0.70% | 0.41% | 0.65% | 0.85% | 1.12% | 1.23% | 1.53% | 1.43% |
Drawdowns
TWCGX vs. MGK - Drawdown Comparison
The maximum TWCGX drawdown since its inception was -59.60%, which is greater than MGK's maximum drawdown of -47.97%. Use the drawdown chart below to compare losses from any high point for TWCGX and MGK.
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Drawdown Indicators
| TWCGX | MGK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -59.60% | -47.97% | -11.63% |
Max Drawdown (1Y)Largest decline over 1 year | -16.69% | -16.85% | +0.16% |
Max Drawdown (5Y)Largest decline over 5 years | -34.92% | -36.01% | +1.09% |
Max Drawdown (10Y)Largest decline over 10 years | -34.92% | -36.01% | +1.09% |
Current DrawdownCurrent decline from peak | -13.56% | -12.56% | -1.00% |
Average DrawdownAverage peak-to-trough decline | -15.34% | -7.51% | -7.83% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.86% | 4.87% | -0.01% |
Volatility
TWCGX vs. MGK - Volatility Comparison
American Century Growth Fund (TWCGX) and Vanguard Mega Cap Growth ETF (MGK) have volatilities of 6.79% and 7.13%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TWCGX | MGK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.79% | 7.13% | -0.34% |
Volatility (6M)Calculated over the trailing 6-month period | 12.60% | 12.93% | -0.33% |
Volatility (1Y)Calculated over the trailing 1-year period | 22.69% | 23.35% | -0.66% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.63% | 22.63% | -1.00% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.27% | 21.82% | -0.55% |