TWCGX vs. IYW
TWCGX (American Century Growth Fund Investor Class) and IYW (iShares U.S. Technology ETF) are both funds - TWCGX is a Large Cap Growth Equities fund actively managed by American Century, while IYW is a Technology Equities fund tracking the Russell 1000 Technology RIC 22.5/45 Capped Index. TWCGX is actively managed, while IYW is passively managed. Over the past 10 years, TWCGX returned 16.05%/yr vs 24.89%/yr for IYW. Their correlation of 0.91 means they have usually moved in the same direction. TWCGX charges 0.96%/yr vs 0.38%/yr for IYW.
Performance
TWCGX vs. IYW - Performance Comparison
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Returns By Period
In the year-to-date period, TWCGX achieves a 4.79% return, which is significantly lower than IYW's 27.06% return. Over the past 10 years, TWCGX has underperformed IYW with an annualized return of 16.05%, while IYW has yielded a comparatively higher 24.89% annualized return.
TWCGX
- 1D
- 2.28%
- 1M
- 0.96%
- 6M
- 8.49%
- YTD
- 4.79%
- 1Y
- 12.82%
- 3Y*
- 19.10%
- 5Y*
- 10.11%
- 10Y*
- 16.05%
- ALL TIME*
- 11.62%
IYW
- 1D
- 4.05%
- 1M
- 4.14%
- 6M
- 30.17%
- YTD
- 27.06%
- 1Y
- 40.11%
- 3Y*
- 32.89%
- 5Y*
- 19.64%
- 10Y*
- 24.89%
- ALL TIME*
- 9.42%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $142.55M | $137.41M | $190.19M | |
| $0.00 | $0.00 | $0.00 |
TWCGX vs. IYW - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TWCGX American Century Growth Fund Investor Class | 4.79% | 15.28% | 26.20% | 43.31% | -31.39% | 27.86% | 35.23% | 35.39% | -1.27% | 30.06% |
IYW iShares U.S. Technology ETF | 27.06% | 25.38% | 30.25% | 65.44% | -34.83% | 35.44% | 47.45% | 46.64% | -0.93% | 36.60% |
Correlation
The correlation between TWCGX and IYW is 0.91, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.91 |
Correlation (3Y) Balances recent behavior with more history. | 0.95 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.96 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.96 |
Correlation (All Time) Calculated using the full available price history since May 19, 2000 | 0.91 |
The correlation between TWCGX and IYW has been stable across timeframes, ranging from 0.91 to 0.96 - a consistent structural relationship.
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Return for Risk
TWCGX vs. IYW — Risk / Return Rank
TWCGX
IYW
TWCGX vs. IYW - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Growth Fund Investor Class (TWCGX) and iShares U.S. Technology ETF (IYW). 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.
| TWCGX | IYW | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.81 | ||
| Sortino ratioReturn per unit of downside risk | -0.97 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 1.28 | -0.13 |
| Calmar ratioReturn relative to maximum drawdown | 0.91 | 2.26 | -1.35 |
| Martin ratioReturn relative to average drawdown | 2.75 | 6.65 | -3.91 |
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Drawdowns
TWCGX vs. IYW - Drawdown Comparison
The maximum TWCGX drawdown since its inception was -59.60%, smaller than the maximum IYW drawdown of -81.90%. Use the drawdown chart below to compare losses from any high point for TWCGX and IYW.
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Drawdown Indicators
| TWCGX | IYW | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -59.60% | -81.90% | +22.30% |
Max Drawdown (1Y)Largest decline over 1 year | -16.69% | -17.81% | +1.12% |
Max Drawdown (3Y)Largest decline over 3 years | -24.20% | -26.47% | +2.27% |
Max Drawdown (5Y)Largest decline over 5 years | -34.92% | -39.44% | +4.52% |
Max Drawdown (10Y)Largest decline over 10 years | -34.92% | -39.44% | +4.52% |
Current DrawdownCurrent decline from peak | -3.97% | -2.43% | -1.54% |
Average DrawdownAverage peak-to-trough decline | -15.26% | -34.47% | +19.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.53% | 6.04% | -0.51% |
Volatility
TWCGX vs. IYW - Volatility Comparison
The current volatility for American Century Growth Fund Investor Class (TWCGX) is 6.19%, while iShares U.S. Technology ETF (IYW) has a volatility of 8.79%. This indicates that TWCGX experiences smaller price fluctuations and is considered to be less risky than IYW based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TWCGX | IYW | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.19% | 8.79% | -2.60% |
Volatility (6M)Calculated over the trailing 6-month period | 14.04% | 20.29% | -6.25% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.56% | 24.09% | -6.53% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.88% | 26.56% | -4.68% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.44% | 25.40% | -3.96% |
TWCGX vs. IYW - Expense Ratio Comparison
TWCGX has a 0.96% expense ratio, which is higher than IYW's 0.38% expense ratio.
Dividends
TWCGX vs. IYW - Dividend Comparison
TWCGX's dividend yield for the trailing twelve months is around 16.35%, more than IYW's 0.10% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IYW iShares U.S. Technology ETF | 0.10% | 0.14% | 0.21% | 0.34% | 0.50% | 0.31% | 0.56% | 0.72% | 0.92% | 0.82% | 1.14% | 1.12% |
TWCGX American Century Growth Fund Investor Class | 16.35% | 17.14% | 5.96% | 4.81% | 4.86% | 9.83% | 5.33% | 5.60% | 14.07% | 10.28% | 4.64% | 6.80% |
Frequently Asked Questions
With a correlation of 0.91, TWCGX and IYW move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
IYW has higher volatility (8.79%) compared to TWCGX (6.19%). In terms of maximum drawdown, TWCGX dropped -59.60% vs IYW's -81.90%.
IYW currently has the higher Sharpe Ratio (1.68 vs 0.87), 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.
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