BWBIX vs. BPTRX

Last updated Jun 24, 2026

BWBIX (Baron WealthBuilder Fund) and BPTRX (Baron Partners Fund) are both mutual funds - BWBIX is a Diversified Portfolio fund managed by Baron Capital Group, Inc., while BPTRX is a Large Cap Growth Equities fund actively managed by Baron Capital Group, Inc.. Over the past 5 years, BWBIX returned 3.76%/yr vs 12.61%/yr for BPTRX. Their correlation of 0.88 suggests significant overlap in exposure. BWBIX charges 0.05%/yr vs 1.36%/yr for BPTRX.

Performance

BWBIX vs. BPTRX - Performance Comparison

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

Returns By Period

In the year-to-date period, BWBIX achieves a 1.98% return, which is significantly lower than BPTRX's 4.67% return.

BWBIX

• 1D: -3.11%
• 1M: 3.27%
• YTD: 1.98%
• 6M: 0.41%
• 1Y: 12.21%
• 3Y*: 13.70%
• 5Y*: 3.76%
• 10Y*: —

BPTRX

• 1D: -6.94%
• 1M: 6.39%
• YTD: 4.67%
• 6M: 1.59%
• 1Y: 37.57%
• 3Y*: 21.32%
• 5Y*: 12.61%
• 10Y*: 25.15%

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

BWBIX vs. BPTRX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
BWBIX Baron WealthBuilder Fund	1.98%	10.23%	19.62%	25.77%	-32.58%	14.76%	62.85%	36.41%	-12.02%
BPTRX Baron Partners Fund	4.67%	24.54%	32.75%	43.09%	-42.53%	31.35%	148.81%	44.99%	-10.24%

Correlation

The correlation between BWBIX and BPTRX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (All Time) Calculated using the full available price history since May 21, 2018	0.88

The correlation between BWBIX and BPTRX has been stable across timeframes, ranging from 0.81 to 0.88 - a consistent structural relationship.

Return for Risk

BWBIX vs. BPTRX — Risk / Return Rank

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

BWBIX

BWBIX Risk / Return Rank: 14
BWBIX Sharpe Ratio Rank: 12
BWBIX Sortino Ratio Rank: 14
BWBIX Omega Ratio Rank: 13
BWBIX Calmar Ratio Rank: 14
BWBIX Martin Ratio Rank: 15

BPTRX

BPTRX Risk / Return Rank: 52
BPTRX Sharpe Ratio Rank: 28
BPTRX Sortino Ratio Rank: 53
BPTRX Omega Ratio Rank: 47
BPTRX Calmar Ratio Rank: 85
BPTRX Martin Ratio Rank: 49

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.

BWBIX vs. BPTRX - Risk-Adjusted Trends Comparison

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

	BWBIX	BPTRX	Difference
Sharpe ratio: Return per unit of total volatility	0.89	1.43	-0.53
Sortino ratio: Return per unit of downside risk	1.42	2.80	-1.37
Omega ratio: Gain probability vs. loss probability	1.17	1.34	-0.17
Calmar ratio: Return relative to maximum drawdown	1.20	3.81	-2.61
Martin ratio: Return relative to average drawdown	3.93	9.56	-5.63

BWBIX vs. BPTRX - Sharpe Ratio Comparison

The current BWBIX Sharpe Ratio is 0.89, which is lower than the BPTRX Sharpe Ratio of 1.43. The chart below compares the historical Sharpe Ratios of BWBIX and BPTRX, 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

BWBIX vs. BPTRX - Drawdown Comparison

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

Drawdown Indicators

	BWBIX	BPTRX	Difference
Max Drawdown Largest peak-to-trough decline	-39.14%	-64.11%	+24.97%
Max Drawdown (1Y) Largest decline over 1 year	-11.65%	-11.15%	-0.50%
Max Drawdown (3Y) Largest decline over 3 years	-21.59%	-33.34%	+11.75%
Max Drawdown (5Y) Largest decline over 5 years	-39.14%	-49.87%	+10.73%
Max Drawdown (10Y) Largest decline over 10 years	—	-51.26%	—
Current Drawdown Current decline from peak	-4.78%	-11.15%	+6.37%
Average Drawdown Average peak-to-trough decline	-11.65%	-13.77%	+2.12%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.55%	4.44%	-0.89%

Volatility

BWBIX vs. BPTRX - Volatility Comparison

The current volatility for Baron WealthBuilder Fund (BWBIX) is 7.20%, while Baron Partners Fund (BPTRX) has a volatility of 13.63%. This indicates that BWBIX experiences smaller price fluctuations and is considered to be less risky than BPTRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BWBIX	BPTRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.20%	13.63%	-6.43%
Volatility (6M) Calculated over the trailing 6-month period	11.71%	17.53%	-5.82%
Volatility (1Y) Calculated over the trailing 1-year period	15.67%	29.86%	-14.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.26%	34.10%	-12.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.18%	32.94%	-9.76%

BWBIX vs. BPTRX - Expense Ratio Comparison

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

Dividends

BWBIX vs. BPTRX - Dividend Comparison

BWBIX's dividend yield for the trailing twelve months is around 7.46%, more than BPTRX's 3.21% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BPTRX Baron Partners Fund	3.21%	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	7.46%	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 BWBIX and BPTRX in my portfolio?

BWBIX and BPTRX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BWBIX or BPTRX?

BPTRX has higher volatility (13.63%) compared to BWBIX (7.20%). In terms of maximum drawdown, BWBIX dropped -39.14% vs BPTRX's -64.11%.

Which has better risk-adjusted returns?

BPTRX currently has the higher Sharpe Ratio (1.43 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.