AULDX vs. VIGIX
Compare and contrast key facts about American Century Ultra Fund Class R6 (AULDX) and Vanguard Growth Index Fund Institutional Shares (VIGIX).
AULDX is an actively managed fund by American Century. It was launched on Jul 26, 2013. VIGIX is managed by Vanguard. It was launched on May 14, 1998.
Performance
AULDX vs. VIGIX - Performance Comparison
Loading graphics...
AULDX vs. VIGIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AULDX American Century Ultra Fund Class R6 | -12.21% | 13.05% | 29.99% | 43.86% | -32.15% | 23.89% | 50.31% | 35.23% | 1.04% | 32.36% |
VIGIX Vanguard Growth Index Fund Institutional Shares | -10.39% | 19.44% | 32.68% | 46.77% | -33.13% | 27.27% | 40.19% | 37.26% | -3.34% | 27.81% |
Returns By Period
In the year-to-date period, AULDX achieves a -12.21% return, which is significantly lower than VIGIX's -10.39% return. Both investments have delivered pretty close results over the past 10 years, with AULDX having a 16.09% annualized return and VIGIX not far behind at 16.03%.
AULDX
- 1D
- -0.65%
- 1M
- -8.77%
- YTD
- -12.21%
- 6M
- -10.72%
- 1Y
- 11.88%
- 3Y*
- 16.86%
- 5Y*
- 9.28%
- 10Y*
- 16.09%
VIGIX
- 1D
- 3.99%
- 1M
- -5.47%
- YTD
- -10.39%
- 6M
- -9.19%
- 1Y
- 17.20%
- 3Y*
- 21.14%
- 5Y*
- 11.43%
- 10Y*
- 16.03%
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
AULDX vs. VIGIX - Expense Ratio Comparison
AULDX has a 0.52% expense ratio, which is higher than VIGIX's 0.04% expense ratio.
Return for Risk
AULDX vs. VIGIX — Risk / Return Rank
AULDX
VIGIX
AULDX vs. VIGIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Ultra Fund Class R6 (AULDX) and Vanguard Growth Index Fund Institutional Shares (VIGIX). 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.
| AULDX | VIGIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.51 | 0.80 | -0.28 |
Sortino ratioReturn per unit of downside risk | 0.91 | 1.31 | -0.40 |
Omega ratioGain probability vs. loss probability | 1.12 | 1.18 | -0.06 |
Calmar ratioReturn relative to maximum drawdown | 0.56 | 1.11 | -0.56 |
Martin ratioReturn relative to average drawdown | 1.98 | 3.97 | -1.99 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading graphics...
Sharpe Ratios by Period
| AULDX | VIGIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.51 | 0.80 | -0.28 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.41 | 0.51 | -0.10 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.73 | 0.75 | -0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.69 | 0.44 | +0.25 |
Correlation
The correlation between AULDX and VIGIX is 0.99, 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
AULDX vs. VIGIX - Dividend Comparison
AULDX's dividend yield for the trailing twelve months is around 12.07%, more than VIGIX's 0.45% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AULDX American Century Ultra Fund Class R6 | 12.07% | 10.60% | 3.32% | 5.68% | 6.97% | 6.42% | 2.67% | 4.18% | 7.94% | 6.19% | 4.45% | 5.06% |
VIGIX Vanguard Growth Index Fund Institutional Shares | 0.45% | 0.41% | 0.47% | 0.58% | 0.70% | 0.48% | 0.66% | 0.95% | 1.32% | 1.15% | 1.40% | 1.31% |
Drawdowns
AULDX vs. VIGIX - Drawdown Comparison
The maximum AULDX drawdown since its inception was -35.03%, smaller than the maximum VIGIX drawdown of -56.95%. Use the drawdown chart below to compare losses from any high point for AULDX and VIGIX.
Loading graphics...
Drawdown Indicators
| AULDX | VIGIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -35.03% | -56.95% | +21.92% |
Max Drawdown (1Y)Largest decline over 1 year | -15.60% | -16.51% | +0.91% |
Max Drawdown (5Y)Largest decline over 5 years | -35.03% | -35.62% | +0.59% |
Max Drawdown (10Y)Largest decline over 10 years | -35.03% | -35.62% | +0.59% |
Current DrawdownCurrent decline from peak | -15.60% | -13.17% | -2.43% |
Average DrawdownAverage peak-to-trough decline | -6.23% | -16.36% | +10.13% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.38% | 4.64% | -0.26% |
Volatility
AULDX vs. VIGIX - Volatility Comparison
The current volatility for American Century Ultra Fund Class R6 (AULDX) is 5.77%, while Vanguard Growth Index Fund Institutional Shares (VIGIX) has a volatility of 7.01%. This indicates that AULDX experiences smaller price fluctuations and is considered to be less risky than VIGIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading graphics...
Volatility by Period
| AULDX | VIGIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.77% | 7.01% | -1.24% |
Volatility (6M)Calculated over the trailing 6-month period | 12.65% | 12.74% | -0.09% |
Volatility (1Y)Calculated over the trailing 1-year period | 23.09% | 22.99% | +0.10% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.54% | 22.36% | +0.18% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.00% | 21.53% | +0.47% |