FDG vs. BRK-B

Last updated Jun 4, 2026

FDG (American Century Focused Dynamic Growth ETF) is Global Equities fund actively managed by American Century, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 5 years, FDG returned 12.61%/yr vs 10.20%/yr for BRK-B. At a 0.30 correlation, their price movements are largely independent.

Performance

FDG vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Focused Dynamic Growth ETF (FDG) and Berkshire Hathaway Inc. (BRK-B). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FDG achieves a 7.52% return, which is significantly higher than BRK-B's -5.43% return.

FDG

• 1D: -2.00%
• 1M: 3.68%
• YTD: 7.52%
• 6M: 9.17%
• 1Y: 31.12%
• 3Y*: 29.27%
• 5Y*: 12.61%
• 10Y*: —

BRK-B

• 1D: 0.82%
• 1M: 1.46%
• YTD: -5.43%
• 6M: -5.61%
• 1Y: -4.51%
• 3Y*: 13.00%
• 5Y*: 10.20%
• 10Y*: 12.91%

*Multi-year figures are annualized to reflect compound growth (CAGR)

FDG vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
FDG American Century Focused Dynamic Growth ETF	7.52%	22.13%	45.89%	37.22%	-35.74%	8.52%	93.61%
BRK-B Berkshire Hathaway Inc.	-5.43%	10.89%	27.09%	15.46%	3.31%	28.95%	29.01%

Correlation

The correlation between FDG and BRK-B is -0.05, 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	-0.05
Correlation (3Y) Calculated over the trailing 3-year period	0.16
Correlation (5Y) Calculated over the trailing 5-year period	0.32
Correlation (All Time) Calculated using the full available price history since Apr 3, 2020	0.30

The correlation between FDG and BRK-B shifts across timeframes, from -0.05 (1 year) to 0.32 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

FDG vs. BRK-B — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

FDG

FDG Risk / Return Rank: 46
FDG Sharpe Ratio Rank: 50
FDG Sortino Ratio Rank: 48
FDG Omega Ratio Rank: 47
FDG Calmar Ratio Rank: 40
FDG Martin Ratio Rank: 43

BRK-B

BRK-B Risk / Return Rank: 23
BRK-B Sharpe Ratio Rank: 27
BRK-B Sortino Ratio Rank: 22
BRK-B Omega Ratio Rank: 23
BRK-B Calmar Ratio Rank: 24
BRK-B Martin Ratio Rank: 20

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

FDG vs. BRK-B - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Focused Dynamic Growth ETF (FDG) 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.

	FDG	BRK-B	Difference
Sharpe ratio Return per unit of total volatility	1.76	-0.32	+2.08
Sortino ratio Return per unit of downside risk	2.37	-0.34	+2.71
Omega ratio Gain probability vs. loss probability	1.30	0.96	+0.34
Calmar ratio Return relative to maximum drawdown	1.99	-0.48	+2.47
Martin ratio Return relative to average drawdown	7.02	-1.02	+8.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FDG vs. BRK-B - Sharpe Ratio Comparison

The current FDG Sharpe Ratio is 1.76, which is higher than the BRK-B Sharpe Ratio of -0.32. The chart below compares the historical Sharpe Ratios of FDG and BRK-B, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FDG	BRK-B	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.76	-0.32	+2.08
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.51	0.60	-0.09
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.67	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.92	0.48	+0.44

Drawdowns

FDG vs. BRK-B - Drawdown Comparison

The maximum FDG drawdown since its inception was -43.69%, smaller than the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for FDG and BRK-B.

Drawdown Indicators

	FDG	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-43.69%	-53.86%	+10.17%
Max Drawdown (1Y) Largest decline over 1 year	-15.71%	-9.42%	-6.29%
Max Drawdown (3Y) Largest decline over 3 years	-26.14%	-14.95%	-11.19%
Max Drawdown (5Y) Largest decline over 5 years	-43.69%	-26.58%	-17.11%
Max Drawdown (10Y) Largest decline over 10 years	—	-29.57%	—
Current Drawdown Current decline from peak	-3.13%	-11.94%	+8.81%
Average Drawdown Average peak-to-trough decline	-13.43%	-11.07%	-2.36%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.45%	4.57%	-0.12%

Volatility

FDG vs. BRK-B - Volatility Comparison

American Century Focused Dynamic Growth ETF (FDG) has a higher volatility of 5.18% compared to Berkshire Hathaway Inc. (BRK-B) at 3.75%. This indicates that FDG'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.

Volatility by Period

	FDG	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.18%	3.75%	+1.43%
Volatility (6M) Calculated over the trailing 6-month period	14.03%	10.68%	+3.35%
Volatility (1Y) Calculated over the trailing 1-year period	17.77%	14.33%	+3.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.67%	17.11%	+7.56%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.90%	19.43%	+5.47%

Dividends

FDG vs. BRK-B - Dividend Comparison

Neither FDG nor BRK-B has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020
BRK-B Berkshire Hathaway Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FDG American Century Focused Dynamic Growth ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.01%

Frequently Asked Questions

Can I hold both FDG and BRK-B in my portfolio?

FDG and BRK-B have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FDG or BRK-B?

FDG has higher volatility (5.18%) compared to BRK-B (3.75%). In terms of maximum drawdown, FDG dropped -43.69% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

FDG currently has the higher Sharpe Ratio (1.76 vs -0.32), 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.