BPTRX vs. BWBIX

Last updated Jun 6, 2026

BPTRX (Baron Partners Fund) and BWBIX (Baron WealthBuilder Fund) are both mutual funds - BPTRX is a Large Cap Growth Equities fund actively managed by Baron Capital Group, Inc., while BWBIX is a Diversified Portfolio fund managed by Baron Capital Group, Inc.. Over the past 5 years, BPTRX returned 14.04%/yr vs 4.70%/yr for BWBIX. Their correlation of 0.88 suggests significant overlap in exposure. BPTRX charges 1.36%/yr vs 0.05%/yr for BWBIX.

Performance

BPTRX vs. BWBIX - Performance Comparison

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

Returns By Period

In the year-to-date period, BPTRX achieves a 5.38% return, which is significantly higher than BWBIX's 2.44% return.

BPTRX

• 1D: 6.62%
• 1M: 10.55%
• YTD: 5.38%
• 6M: 5.94%
• 1Y: 49.09%
• 3Y*: 24.91%
• 5Y*: 14.04%
• 10Y*: 24.67%

BWBIX

• 1D: 2.87%
• 1M: 4.37%
• YTD: 2.44%
• 6M: 2.51%
• 1Y: 14.11%
• 3Y*: 14.65%
• 5Y*: 4.70%
• 10Y*: —

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

BPTRX vs. BWBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
BPTRX Baron Partners Fund	5.38%	24.54%	32.75%	43.09%	-42.53%	31.35%	148.81%	44.99%	-11.19%
BWBIX Baron WealthBuilder Fund	2.44%	10.23%	19.62%	25.77%	-32.58%	14.76%	62.85%	36.41%	-12.02%

Correlation

The correlation between BPTRX and BWBIX is 0.80, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.81
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (All Time) Calculated using the full available price history since May 22, 2018	0.88

The correlation between BPTRX and BWBIX has been stable across timeframes, ranging from 0.80 to 0.88 - a consistent structural relationship.

Return for Risk

BPTRX vs. BWBIX — Risk / Return Rank

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

BPTRX

BPTRX Risk / Return Rank: 51
BPTRX Sharpe Ratio Rank: 27
BPTRX Sortino Ratio Rank: 51
BPTRX Omega Ratio Rank: 45
BPTRX Calmar Ratio Rank: 84
BPTRX Martin Ratio Rank: 47

BWBIX

BWBIX Risk / Return Rank: 13
BWBIX Sharpe Ratio Rank: 12
BWBIX Sortino Ratio Rank: 14
BWBIX Omega Ratio Rank: 12
BWBIX Calmar Ratio Rank: 13
BWBIX Martin Ratio Rank: 14

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. BWBIX - Risk-Adjusted Trends Comparison

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

	BPTRX	BWBIX	Difference
Sharpe ratio: Return per unit of total volatility	1.44	0.89	+0.55
Sortino ratio: Return per unit of downside risk	2.89	1.44	+1.45
Omega ratio: Gain probability vs. loss probability	1.35	1.17	+0.18
Calmar ratio: Return relative to maximum drawdown	3.82	1.12	+2.69
Martin ratio: Return relative to average drawdown	9.35	3.70	+5.65
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BPTRX vs. BWBIX - Sharpe Ratio Comparison

The current BPTRX Sharpe Ratio is 1.44, which is higher than the BWBIX Sharpe Ratio of 0.89. The chart below compares the historical Sharpe Ratios of BPTRX and BWBIX, 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

	BPTRX	BWBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.44	0.89	+0.55
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.42	0.22	+0.19
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.76	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.54	+0.02

Drawdowns

BPTRX vs. BWBIX - Drawdown Comparison

The maximum BPTRX drawdown since its inception was -64.11%, which is greater than BWBIX's maximum drawdown of -39.14%. Use the drawdown chart below to compare losses from any high point for BPTRX and BWBIX.

Drawdown Indicators

	BPTRX	BWBIX	Difference
Max Drawdown Largest peak-to-trough decline	-64.11%	-39.14%	-24.97%
Max Drawdown (1Y) Largest decline over 1 year	-10.71%	-11.65%	+0.94%
Max Drawdown (3Y) Largest decline over 3 years	-33.34%	-21.59%	-11.75%
Max Drawdown (5Y) Largest decline over 5 years	-49.87%	-39.14%	-10.73%
Max Drawdown (10Y) Largest decline over 10 years	-51.26%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-13.78%	-11.71%	-2.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.40%	3.53%	+0.87%

Volatility

BPTRX vs. BWBIX - Volatility Comparison

Baron Partners Fund (BPTRX) has a higher volatility of 7.13% compared to Baron WealthBuilder Fund (BWBIX) at 4.48%. This indicates that BPTRX's price experiences larger fluctuations and is considered to be riskier than BWBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BPTRX	BWBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.13%	4.48%	+2.65%
Volatility (6M) Calculated over the trailing 6-month period	22.15%	11.37%	+10.78%
Volatility (1Y) Calculated over the trailing 1-year period	28.35%	14.68%	+13.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	33.72%	21.11%	+12.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.75%	23.15%	+9.60%

BPTRX vs. BWBIX - Expense Ratio Comparison

BPTRX has a 1.36% expense ratio, which is higher than BWBIX's 0.05% expense ratio.

Dividends

BPTRX vs. BWBIX - Dividend Comparison

BPTRX's dividend yield for the trailing twelve months is around 3.19%, less than BWBIX's 7.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BPTRX Baron Partners Fund	3.19%	3.36%	0.76%	0.00%	3.19%	7.72%	3.67%	0.26%	0.00%	0.00%	0.00%	0.35%
BWBIX Baron WealthBuilder Fund	7.43%	7.61%	0.77%	0.06%	3.21%	3.75%	1.24%	3.51%	0.14%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both BPTRX and BWBIX in my portfolio?

BPTRX and BWBIX have a correlation of 0.80, 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 BWBIX?

BPTRX has higher volatility (7.13%) compared to BWBIX (4.48%). In terms of maximum drawdown, BPTRX dropped -64.11% vs BWBIX's -39.14%.

Which has better risk-adjusted returns?

BPTRX currently has the higher Sharpe Ratio (1.44 vs 0.89), 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.