BPTRX vs. BIOPX

Last updated Jun 20, 2026

BPTRX (Baron Partners Fund) and BIOPX (Baron Opportunity Fund) are both Large Cap Growth Equities funds from Baron Capital Group, Inc.. Over the past 10 years, BPTRX returned 25.50%/yr vs 22.22%/yr for BIOPX. A 0.74 correlation means they provide meaningful diversification when combined. BPTRX charges 1.36%/yr vs 1.31%/yr for BIOPX.

Performance

BPTRX vs. BIOPX - Performance Comparison

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

Returns By Period

In the year-to-date period, BPTRX achieves a 12.47% return, which is significantly lower than BIOPX's 16.82% return. Over the past 10 years, BPTRX has outperformed BIOPX with an annualized return of 25.50%, while BIOPX has yielded a comparatively lower 22.22% annualized return.

BPTRX

• 1D: -1.26%
• 1M: 14.33%
• YTD: 12.47%
• 6M: 9.60%
• 1Y: 52.92%
• 3Y*: 24.00%
• 5Y*: 14.99%
• 10Y*: 25.50%

BIOPX

• 1D: 0.77%
• 1M: 9.55%
• YTD: 16.82%
• 6M: 16.30%
• 1Y: 35.79%
• 3Y*: 28.78%
• 5Y*: 11.36%
• 10Y*: 22.22%

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

BPTRX vs. BIOPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BPTRX Baron Partners Fund	12.47%	24.54%	32.75%	43.09%	-42.53%	31.35%	148.81%	44.99%	-2.01%	31.54%
BIOPX Baron Opportunity Fund	16.82%	19.44%	39.87%	49.55%	-42.96%	11.90%	88.78%	40.34%	8.06%	40.58%

Correlation

The correlation between BPTRX and BIOPX is 0.62, 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	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Feb 29, 2000	0.74

The correlation between BPTRX and BIOPX shifts across timeframes, from 0.62 (1 year) to 0.78 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

BPTRX vs. BIOPX — Risk / Return Rank

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

BPTRX

BPTRX Risk / Return Rank: 74
BPTRX Sharpe Ratio Rank: 48
BPTRX Sortino Ratio Rank: 86
BPTRX Omega Ratio Rank: 74
BPTRX Calmar Ratio Rank: 94
BPTRX Martin Ratio Rank: 69

BIOPX

BIOPX Risk / Return Rank: 43
BIOPX Sharpe Ratio Rank: 44
BIOPX Sortino Ratio Rank: 43
BIOPX Omega Ratio Rank: 42
BIOPX Calmar Ratio Rank: 48
BIOPX Martin Ratio Rank: 40

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.

BPTRX vs. BIOPX - Risk-Adjusted Trends Comparison

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

	BPTRX	BIOPX	Difference
Sharpe ratio: Return per unit of total volatility	1.83	1.73	+0.09
Sortino ratio: Return per unit of downside risk	3.76	2.47	+1.29
Omega ratio: Gain probability vs. loss probability	1.43	1.31	+0.11
Calmar ratio: Return relative to maximum drawdown	4.93	2.47	+2.47
Martin ratio: Return relative to average drawdown	12.04	8.08	+3.95

BPTRX vs. BIOPX - Sharpe Ratio Comparison

The current BPTRX Sharpe Ratio is 1.83, which is comparable to the BIOPX Sharpe Ratio of 1.73. The chart below compares the historical Sharpe Ratios of BPTRX and BIOPX, 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

BPTRX vs. BIOPX - Drawdown Comparison

The maximum BPTRX drawdown since its inception was -64.11%, smaller than the maximum BIOPX drawdown of -67.91%. Use the drawdown chart below to compare losses from any high point for BPTRX and BIOPX.

Drawdown Indicators

	BPTRX	BIOPX	Difference
Max Drawdown Largest peak-to-trough decline	-64.11%	-67.91%	+3.80%
Max Drawdown (1Y) Largest decline over 1 year	-10.71%	-14.16%	+3.45%
Max Drawdown (3Y) Largest decline over 3 years	-33.34%	-26.34%	-7.00%
Max Drawdown (5Y) Largest decline over 5 years	-49.87%	-51.45%	+1.58%
Max Drawdown (10Y) Largest decline over 10 years	-51.26%	-51.45%	+0.19%
Current Drawdown Current decline from peak	-4.52%	-1.44%	-3.08%
Average Drawdown Average peak-to-trough decline	-13.77%	-16.85%	+3.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.38%	4.31%	+0.07%

Volatility

BPTRX vs. BIOPX - Volatility Comparison

Baron Partners Fund (BPTRX) has a higher volatility of 11.09% compared to Baron Opportunity Fund (BIOPX) at 9.18%. This indicates that BPTRX's price experiences larger fluctuations and is considered to be riskier than BIOPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BPTRX	BIOPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	11.09%	9.18%	+1.91%
Volatility (6M) Calculated over the trailing 6-month period	16.00%	14.64%	+1.36%
Volatility (1Y) Calculated over the trailing 1-year period	28.94%	20.15%	+8.79%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.94%	26.93%	+7.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.86%	24.99%	+7.87%

BPTRX vs. BIOPX - Expense Ratio Comparison

BPTRX has a 1.36% expense ratio, which is higher than BIOPX's 1.31% expense ratio.

Dividends

BPTRX vs. BIOPX - Dividend Comparison

BPTRX's dividend yield for the trailing twelve months is around 2.99%, less than BIOPX's 3.63% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIOPX Baron Opportunity Fund	3.63%	4.24%	4.95%	0.00%	0.00%	8.71%	6.96%	7.33%	5.29%	15.58%	13.52%	10.92%
BPTRX Baron Partners Fund	2.99%	3.36%	0.76%	0.00%	3.19%	7.72%	3.67%	0.26%	0.00%	0.00%	0.00%	0.35%

Frequently Asked Questions

Can I hold both BPTRX and BIOPX in my portfolio?

BPTRX and BIOPX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BPTRX or BIOPX?

BPTRX has higher volatility (11.09%) compared to BIOPX (9.18%). In terms of maximum drawdown, BPTRX dropped -64.11% vs BIOPX's -67.91%.

Which has better risk-adjusted returns?

BPTRX currently has the higher Sharpe Ratio (1.83 vs 1.73), 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.