AGTHX vs. BRK-B
AGTHX (American Funds The Growth Fund of America Class A) is Large Cap Growth Equities fund actively managed by Capital Group, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, AGTHX returned 15.79%/yr vs 13.41%/yr for BRK-B. At a 0.45 correlation, their price movements are largely independent.
Performance
AGTHX vs. BRK-B - Performance Comparison
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Returns By Period
In the year-to-date period, AGTHX achieves a 6.60% return, which is significantly higher than BRK-B's -1.42% return. Over the past 10 years, AGTHX has outperformed BRK-B with an annualized return of 15.79%, while BRK-B has yielded a comparatively lower 13.41% annualized return.
AGTHX
- 1D
- 0.27%
- 1M
- 0.45%
- YTD
- 6.60%
- 6M
- 7.72%
- 1Y
- 21.49%
- 3Y*
- 22.87%
- 5Y*
- 11.31%
- 10Y*
- 15.79%
BRK-B
- 1D
- 1.28%
- 1M
- 2.66%
- YTD
- -1.42%
- 6M
- -2.14%
- 1Y
- 1.64%
- 3Y*
- 13.57%
- 5Y*
- 11.85%
- 10Y*
- 13.41%
AGTHX vs. BRK-B - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AGTHX American Funds The Growth Fund of America Class A | 6.60% | 19.73% | 28.02% | 37.22% | -30.75% | 19.32% | 37.83% | 28.16% | -3.15% | 26.14% |
BRK-B Berkshire Hathaway Inc. | -1.42% | 10.89% | 27.09% | 15.46% | 3.31% | 28.95% | 2.37% | 10.93% | 3.01% | 21.62% |
Correlation
The correlation between AGTHX and BRK-B is 0.00, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.00 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.24 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.41 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.48 |
Correlation (All Time) Calculated using the full available price history since May 9, 1996 | 0.45 |
Over the past year, the correlation between AGTHX and BRK-B has dropped to 0.00 - well below their long-term average of 0.45, suggesting their price drivers have been diverging.
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Return for Risk
AGTHX vs. BRK-B — Risk / Return Rank
AGTHX
BRK-B
AGTHX vs. BRK-B - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds The Growth Fund of America Class A (AGTHX) and Berkshire Hathaway Inc. (BRK-B). 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.
| AGTHX | BRK-B | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.14 | ||
| Sortino ratioReturn per unit of downside risk | +1.50 | ||
| Omega ratioGain probability vs. loss probability | 1.23 | 1.03 | +0.20 |
| Calmar ratioReturn relative to maximum drawdown | 1.46 | 0.17 | +1.29 |
| Martin ratioReturn relative to average drawdown | 5.60 | 0.36 | +5.24 |
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Drawdowns
AGTHX vs. BRK-B - Drawdown Comparison
The maximum AGTHX drawdown since its inception was -51.91%, roughly equal to the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for AGTHX and BRK-B.
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Drawdown Indicators
| AGTHX | BRK-B | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -51.91% | -53.86% | +1.95% |
Max Drawdown (1Y)Largest decline over 1 year | -13.76% | -9.42% | -4.34% |
Max Drawdown (3Y)Largest decline over 3 years | -21.57% | -14.95% | -6.62% |
Max Drawdown (5Y)Largest decline over 5 years | -36.38% | -26.58% | -9.80% |
Max Drawdown (10Y)Largest decline over 10 years | -36.38% | -29.57% | -6.81% |
Current DrawdownCurrent decline from peak | -3.49% | -8.20% | +4.71% |
Average DrawdownAverage peak-to-trough decline | -9.19% | -11.07% | +1.88% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.59% | 4.53% | -0.94% |
Volatility
AGTHX vs. BRK-B - Volatility Comparison
American Funds The Growth Fund of America Class A (AGTHX) has a higher volatility of 6.25% compared to Berkshire Hathaway Inc. (BRK-B) at 4.12%. This indicates that AGTHX's price experiences larger fluctuations and is considered to be riskier than BRK-B based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AGTHX | BRK-B | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.25% | 4.12% | +2.13% |
Volatility (6M)Calculated over the trailing 6-month period | 12.77% | 10.80% | +1.97% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.00% | 14.45% | +1.55% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 20.37% | 17.13% | +3.24% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.75% | 19.44% | +0.31% |
Dividends
AGTHX vs. BRK-B - Dividend Comparison
AGTHX's dividend yield for the trailing twelve months is around 10.03%, while BRK-B has not paid dividends to shareholders.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AGTHX American Funds The Growth Fund of America Class A | 10.03% | 10.69% | 8.99% | 7.40% | 4.05% | 8.18% | 4.30% | 7.15% | 11.99% | 7.03% | 6.61% | 8.87% |
BRK-B Berkshire Hathaway Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
AGTHX and BRK-B have a correlation of 0.00, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AGTHX has higher volatility (6.25%) compared to BRK-B (4.12%). In terms of maximum drawdown, AGTHX dropped -51.91% vs BRK-B's -53.86%.
AGTHX currently has the higher Sharpe Ratio (1.26 vs 0.11), 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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