PREFX vs. AMRGX
Compare and contrast key facts about T. Rowe Price Tax-Efficient Equity Fund (PREFX) and American Growth Fund Series One (AMRGX).
PREFX is managed by T. Rowe Price. It was launched on Dec 29, 2000. AMRGX is managed by American Growth. It was launched on Jul 31, 1958.
Performance
PREFX vs. AMRGX - Performance Comparison
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PREFX vs. AMRGX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PREFX T. Rowe Price Tax-Efficient Equity Fund | -9.48% | 16.30% | 32.37% | 36.98% | -30.52% | 22.19% | 35.32% | 36.59% | -0.46% | 28.80% |
AMRGX American Growth Fund Series One | 1.60% | 11.18% | 16.61% | 24.38% | -19.93% | 15.64% | 18.65% | 36.73% | -9.07% | 13.37% |
Returns By Period
In the year-to-date period, PREFX achieves a -9.48% return, which is significantly lower than AMRGX's 1.60% return. Over the past 10 years, PREFX has outperformed AMRGX with an annualized return of 14.98%, while AMRGX has yielded a comparatively lower 10.73% annualized return.
PREFX
- 1D
- 3.81%
- 1M
- -5.76%
- YTD
- -9.48%
- 6M
- -9.30%
- 1Y
- 15.23%
- 3Y*
- 19.43%
- 5Y*
- 9.56%
- 10Y*
- 14.98%
AMRGX
- 1D
- 2.95%
- 1M
- -8.89%
- YTD
- 1.60%
- 6M
- 10.24%
- 1Y
- 18.83%
- 3Y*
- 15.12%
- 5Y*
- 7.66%
- 10Y*
- 10.73%
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PREFX vs. AMRGX - Expense Ratio Comparison
PREFX has a 0.76% expense ratio, which is lower than AMRGX's 4.07% expense ratio.
Return for Risk
PREFX vs. AMRGX — Risk / Return Rank
PREFX
AMRGX
PREFX vs. AMRGX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Tax-Efficient Equity Fund (PREFX) and American Growth Fund Series One (AMRGX). 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.
| PREFX | AMRGX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.75 | 0.71 | +0.04 |
Sortino ratioReturn per unit of downside risk | 1.25 | 1.25 | 0.00 |
Omega ratioGain probability vs. loss probability | 1.17 | 1.21 | -0.04 |
Calmar ratioReturn relative to maximum drawdown | 0.84 | 1.20 | -0.36 |
Martin ratioReturn relative to average drawdown | 2.76 | 2.91 | -0.15 |
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
| PREFX | AMRGX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.75 | 0.71 | +0.04 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.45 | 0.35 | +0.09 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.71 | 0.51 | +0.21 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.44 | 0.10 | +0.34 |
Correlation
The correlation between PREFX and AMRGX is 0.86, 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
PREFX vs. AMRGX - Dividend Comparison
PREFX has not paid dividends to shareholders, while AMRGX's dividend yield for the trailing twelve months is around 17.54%.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
PREFX T. Rowe Price Tax-Efficient Equity Fund | 0.00% | 0.00% | 0.85% | 0.61% | 0.88% | 2.09% | 1.98% | 0.94% | 1.36% | 2.82% | 0.22% | 0.55% |
AMRGX American Growth Fund Series One | 17.54% | 17.82% | 12.39% | 8.17% | 7.77% | 12.21% | 2.36% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Drawdowns
PREFX vs. AMRGX - Drawdown Comparison
The maximum PREFX drawdown since its inception was -56.70%, smaller than the maximum AMRGX drawdown of -80.32%. Use the drawdown chart below to compare losses from any high point for PREFX and AMRGX.
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Drawdown Indicators
| PREFX | AMRGX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -56.70% | -80.32% | +23.62% |
Max Drawdown (1Y)Largest decline over 1 year | -16.18% | -13.98% | -2.20% |
Max Drawdown (5Y)Largest decline over 5 years | -35.95% | -35.42% | -0.53% |
Max Drawdown (10Y)Largest decline over 10 years | -35.95% | -35.42% | -0.53% |
Current DrawdownCurrent decline from peak | -12.99% | -11.44% | -1.55% |
Average DrawdownAverage peak-to-trough decline | -10.31% | -40.45% | +30.14% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.95% | 5.78% | -0.83% |
Volatility
PREFX vs. AMRGX - Volatility Comparison
T. Rowe Price Tax-Efficient Equity Fund (PREFX) and American Growth Fund Series One (AMRGX) have volatilities of 6.84% and 7.00%, 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
| PREFX | AMRGX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.84% | 7.00% | -0.16% |
Volatility (6M)Calculated over the trailing 6-month period | 12.36% | 23.66% | -11.30% |
Volatility (1Y)Calculated over the trailing 1-year period | 22.29% | 28.35% | -6.06% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.68% | 21.88% | -0.20% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.21% | 21.32% | -0.11% |