BIOPX vs. BIGFX

Last updated Jun 5, 2026

BIOPX (Baron Opportunity Fund) and BIGFX (Baron International Growth Fund) are both mutual funds - BIOPX is a Large Cap Growth Equities fund managed by Baron Capital Group, Inc., while BIGFX is a Foreign Large Cap Equities fund managed by Baron Capital Group, Inc.. Over the past 10 years, BIOPX returned 21.34%/yr vs 8.44%/yr for BIGFX. A 0.72 correlation means they provide meaningful diversification when combined. BIOPX charges 1.31%/yr vs 1.20%/yr for BIGFX.

Performance

BIOPX vs. BIGFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Baron Opportunity Fund (BIOPX) and Baron International Growth Fund (BIGFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BIOPX achieves a 9.78% return, which is significantly lower than BIGFX's 11.65% return. Over the past 10 years, BIOPX has outperformed BIGFX with an annualized return of 21.34%, while BIGFX has yielded a comparatively lower 8.44% annualized return.

BIOPX

• 1D: -1.32%
• 1M: 7.69%
• YTD: 9.78%
• 6M: 13.37%
• 1Y: 26.20%
• 3Y*: 27.69%
• 5Y*: 11.18%
• 10Y*: 21.34%

BIGFX

• 1D: -0.65%
• 1M: 3.05%
• YTD: 11.65%
• 6M: 12.32%
• 1Y: 18.28%
• 3Y*: 13.05%
• 5Y*: 1.69%
• 10Y*: 8.44%

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

BIOPX vs. BIGFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BIOPX Baron Opportunity Fund	9.78%	19.44%	39.87%	49.55%	-42.96%	11.90%	88.78%	40.34%	8.06%	40.58%
BIGFX Baron International Growth Fund	11.65%	20.80%	4.11%	7.33%	-27.47%	9.63%	30.52%	29.06%	-17.88%	36.95%

Correlation

The correlation between BIOPX and BIGFX is 0.68, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.68
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.71
Correlation (10Y) Calculated over the trailing 10-year period	0.72
Correlation (All Time) Calculated using the full available price history since Jan 6, 2009	0.72

The correlation between BIOPX and BIGFX has been stable across timeframes, ranging from 0.66 to 0.72 - a consistent structural relationship.

Return for Risk

BIOPX vs. BIGFX — Risk / Return Rank

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

BIOPX

BIOPX Risk / Return Rank: 27
BIOPX Sharpe Ratio Rank: 28
BIOPX Sortino Ratio Rank: 26
BIOPX Omega Ratio Rank: 27
BIOPX Calmar Ratio Rank: 28
BIOPX Martin Ratio Rank: 27

BIGFX

BIGFX Risk / Return Rank: 19
BIGFX Sharpe Ratio Rank: 18
BIGFX Sortino Ratio Rank: 18
BIGFX Omega Ratio Rank: 19
BIGFX Calmar Ratio Rank: 19
BIGFX 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.

BIOPX vs. BIGFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baron Opportunity Fund (BIOPX) and Baron International Growth Fund (BIGFX). 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.

	BIOPX	BIGFX	Difference
Sharpe ratio: Return per unit of total volatility	1.51	1.19	+0.31
Sortino ratio: Return per unit of downside risk	2.14	1.73	+0.41
Omega ratio: Gain probability vs. loss probability	1.27	1.22	+0.05
Calmar ratio: Return relative to maximum drawdown	1.95	1.53	+0.42
Martin ratio: Return relative to average drawdown	6.45	5.02	+1.43
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BIOPX vs. BIGFX - Sharpe Ratio Comparison

The current BIOPX Sharpe Ratio is 1.51, which is comparable to the BIGFX Sharpe Ratio of 1.19. The chart below compares the historical Sharpe Ratios of BIOPX and BIGFX, 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

	BIOPX	BIGFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.51	1.19	+0.31
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.42	0.10	+0.32
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	0.49	+0.37
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.56	-0.15

Drawdowns

BIOPX vs. BIGFX - Drawdown Comparison

The maximum BIOPX drawdown since its inception was -67.91%, which is greater than BIGFX's maximum drawdown of -41.12%. Use the drawdown chart below to compare losses from any high point for BIOPX and BIGFX.

Drawdown Indicators

	BIOPX	BIGFX	Difference
Max Drawdown Largest peak-to-trough decline	-67.91%	-41.12%	-26.79%
Max Drawdown (1Y) Largest decline over 1 year	-14.16%	-12.71%	-1.45%
Max Drawdown (3Y) Largest decline over 3 years	-26.34%	-16.71%	-9.63%
Max Drawdown (5Y) Largest decline over 5 years	-51.45%	-41.12%	-10.33%
Max Drawdown (10Y) Largest decline over 10 years	-51.45%	-41.12%	-10.33%
Current Drawdown Current decline from peak	-1.36%	-0.65%	-0.71%
Average Drawdown Average peak-to-trough decline	-16.87%	-10.04%	-6.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.27%	3.86%	+0.41%

Volatility

BIOPX vs. BIGFX - Volatility Comparison

The current volatility for Baron Opportunity Fund (BIOPX) is 3.74%, while Baron International Growth Fund (BIGFX) has a volatility of 5.57%. This indicates that BIOPX experiences smaller price fluctuations and is considered to be less risky than BIGFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BIOPX	BIGFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.74%	5.57%	-1.83%
Volatility (6M) Calculated over the trailing 6-month period	12.92%	13.40%	-0.48%
Volatility (1Y) Calculated over the trailing 1-year period	18.35%	16.33%	+2.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.69%	17.07%	+9.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.85%	17.23%	+7.62%

BIOPX vs. BIGFX - Expense Ratio Comparison

BIOPX has a 1.31% expense ratio, which is higher than BIGFX's 1.20% expense ratio.

Dividends

BIOPX vs. BIGFX - Dividend Comparison

BIOPX's dividend yield for the trailing twelve months is around 3.86%, more than BIGFX's 0.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIGFX Baron International Growth Fund	0.76%	0.85%	0.80%	0.35%	1.25%	5.24%	0.02%	0.08%	3.56%	3.54%	0.93%	0.62%
BIOPX Baron Opportunity Fund	3.86%	4.24%	4.95%	0.00%	0.00%	8.71%	6.96%	7.33%	5.29%	15.58%	13.52%	10.92%

Frequently Asked Questions

Can I hold both BIOPX and BIGFX in my portfolio?

BIOPX and BIGFX have a correlation of 0.68, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BIOPX or BIGFX?

BIGFX has higher volatility (5.57%) compared to BIOPX (3.74%). In terms of maximum drawdown, BIOPX dropped -67.91% vs BIGFX's -41.12%.

Which has better risk-adjusted returns?

BIOPX currently has the higher Sharpe Ratio (1.51 vs 1.19), 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.