BIOPX vs. BDAIX

Last updated Aug 5, 2026

BIOPX (Baron Opportunity Fund) and BDAIX (Baron Durable Advantage Fund) are both Large Cap Growth Equities funds from Baron Capital. Over the past 5 years, BIOPX returned 9.34%/yr vs 13.57%/yr for BDAIX. Their correlation of 0.87 means they have usually moved in the same direction. BIOPX charges 1.31%/yr vs 1.48%/yr for BDAIX.

Performance

BIOPX vs. BDAIX - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with BIOPX having a 7.45% return and BDAIX slightly higher at 7.73%.

BIOPX

• 1D: 2.71%
• 1M: -4.92%
• 6M: 12.16%
• YTD: 7.45%
• 1Y: 14.64%
• 3Y*: 25.17%
• 5Y*: 9.34%
• 10Y*: 20.71%
• ALL TIME*: 10.45%

BDAIX

• 1D: 1.81%
• 1M: 4.36%
• 6M: 8.09%
• YTD: 7.73%
• 1Y: 11.03%
• 3Y*: 20.65%
• 5Y*: 13.57%
• 10Y*: —
• ALL TIME*: 18.48%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BDAIX Baron Durable Advantage Fund	$0.00	$0.00	$0.00
BIOPX Baron Opportunity Fund	$0.00	$0.00	$0.00

BIOPX vs. BDAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
BIOPX Baron Opportunity Fund	7.45%	19.44%	39.87%	49.55%	-42.96%	11.90%	88.78%	20.17%
BDAIX Baron Durable Advantage Fund	7.73%	16.56%	27.14%	45.51%	-24.81%	32.17%	20.32%	27.34%

Correlation

The correlation between BIOPX and BDAIX is 0.85, 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.	0.85
Correlation (3Y) Balances recent behavior with more history.	0.88
Correlation (5Y) Shows whether the relationship held over a longer period.	0.89
Correlation (All Time) Calculated using the full available price history since Feb 19, 2019	0.87

The correlation between BIOPX and BDAIX has been stable across timeframes, ranging from 0.85 to 0.89 - a consistent structural relationship.

Return for Risk

BIOPX vs. BDAIX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

BIOPX

BIOPX Risk / Return Rank: 22
BIOPX Sharpe Ratio Rank: 20
BIOPX Sortino Ratio Rank: 22
BIOPX Omega Ratio Rank: 21
BIOPX Calmar Ratio Rank: 24
BIOPX Martin Ratio Rank: 23

BDAIX

BDAIX Risk / Return Rank: 19
BDAIX Sharpe Ratio Rank: 19
BDAIX Sortino Ratio Rank: 19
BDAIX Omega Ratio Rank: 19
BDAIX Calmar Ratio Rank: 17
BDAIX Martin Ratio Rank: 21

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

BIOPX vs. BDAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baron Opportunity Fund (BIOPX) and Baron Durable Advantage Fund (BDAIX). 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.

	BIOPX	BDAIX	Difference
Sharpe ratio: Return per unit of total volatility	0.80	0.77	+0.04
Sortino ratio: Return per unit of downside risk	1.27	1.17	+0.10
Omega ratio: Gain probability vs. loss probability	1.16	1.14	+0.01
Calmar ratio: Return relative to maximum drawdown	1.21	0.91	+0.31
Martin ratio: Return relative to average drawdown	3.35	3.21	+0.14

BIOPX vs. BDAIX - Sharpe Ratio Comparison

The current BIOPX Sharpe Ratio is 0.80, which is comparable to the BDAIX Sharpe Ratio of 0.77. The chart below compares the historical Sharpe Ratios of BIOPX and BDAIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BIOPX vs. BDAIX - Drawdown Comparison

The maximum BIOPX drawdown since its inception was -67.91%, which is greater than BDAIX's maximum drawdown of -33.57%. Use the drawdown chart below to compare losses from any high point for BIOPX and BDAIX.

Drawdown Indicators

	BIOPX	BDAIX	Difference
Max Drawdown Largest peak-to-trough decline	-67.91%	-33.57%	-34.34%
Max Drawdown (1Y) Largest decline over 1 year	-14.31%	-14.82%	+0.51%
Max Drawdown (3Y) Largest decline over 3 years	-26.34%	-21.79%	-4.55%
Max Drawdown (5Y) Largest decline over 5 years	-51.45%	-30.25%	-21.20%
Max Drawdown (10Y) Largest decline over 10 years	-51.45%	—	—
Current Drawdown Current decline from peak	-9.35%	0.00%	-9.35%
Average Drawdown Average peak-to-trough decline	-16.81%	-5.76%	-11.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.18%	4.18%	+1.00%

Volatility

BIOPX vs. BDAIX - Volatility Comparison

Baron Opportunity Fund (BIOPX) has a higher volatility of 6.90% compared to Baron Durable Advantage Fund (BDAIX) at 5.91%. This indicates that BIOPX's price experiences larger fluctuations and is considered to be riskier than BDAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BIOPX	BDAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.90%	5.91%	+0.99%
Volatility (6M) Calculated over the trailing 6-month period	16.72%	13.98%	+2.74%
Volatility (1Y) Calculated over the trailing 1-year period	21.66%	17.58%	+4.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.19%	20.55%	+6.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.06%	21.96%	+3.10%

BIOPX vs. BDAIX - Expense Ratio Comparison

BIOPX has a 1.31% expense ratio, which is lower than BDAIX's 1.48% expense ratio.

Dividends

BIOPX vs. BDAIX - Dividend Comparison

BIOPX's dividend yield for the trailing twelve months is around 3.94%, while BDAIX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BDAIX Baron Durable Advantage Fund	0.00%	0.00%	0.23%	0.10%	0.00%	0.33%	0.12%	0.00%	0.00%	0.00%	0.00%	0.00%
BIOPX Baron Opportunity Fund	3.94%	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 BDAIX in my portfolio?

BIOPX and BDAIX have a correlation of 0.85, 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 BDAIX?

BIOPX has higher volatility (6.90%) compared to BDAIX (5.91%). In terms of maximum drawdown, BIOPX dropped -67.91% vs BDAIX's -33.57%.

Which has better risk-adjusted returns?

BIOPX currently has the higher Sharpe Ratio (0.80 vs 0.77), 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.