NSOIX vs. BWBIX

Last updated Jun 4, 2026

NSOIX (North Star Opportunity Fund) and BWBIX (Baron WealthBuilder Fund) are both Diversified Portfolio funds. Over the past 5 years, NSOIX returned 5.26%/yr vs 4.59%/yr for BWBIX. Their correlation of 0.83 suggests significant overlap in exposure. NSOIX charges 1.30%/yr vs 0.05%/yr for BWBIX.

Performance

NSOIX vs. BWBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in North Star Opportunity Fund (NSOIX) 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, NSOIX achieves a 9.37% return, which is significantly higher than BWBIX's 0.74% return.

NSOIX

• 1D: 0.10%
• 1M: 4.87%
• YTD: 9.37%
• 6M: 10.13%
• 1Y: 28.94%
• 3Y*: 14.06%
• 5Y*: 5.26%
• 10Y*: 9.31%

BWBIX

• 1D: -1.04%
• 1M: 4.14%
• YTD: 0.74%
• 6M: 5.76%
• 1Y: 11.63%
• 3Y*: 13.94%
• 5Y*: 4.59%
• 10Y*: —

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

NSOIX vs. BWBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
NSOIX North Star Opportunity Fund	9.37%	12.60%	10.84%	13.65%	-23.08%	20.83%	17.57%	26.61%	-9.11%
BWBIX Baron WealthBuilder Fund	0.74%	10.23%	19.62%	25.77%	-32.58%	14.76%	62.85%	36.41%	-12.02%

Correlation

The correlation between NSOIX and BWBIX is 0.74, 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	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.82
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (All Time) Calculated using the full available price history since May 22, 2018	0.83

The correlation between NSOIX and BWBIX shifts across timeframes, from 0.74 (1 year) to 0.86 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

NSOIX vs. BWBIX — Risk / Return Rank

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

NSOIX

NSOIX Risk / Return Rank: 82
NSOIX Sharpe Ratio Rank: 86
NSOIX Sortino Ratio Rank: 83
NSOIX Omega Ratio Rank: 74
NSOIX Calmar Ratio Rank: 85
NSOIX Martin Ratio Rank: 80

BWBIX

BWBIX Risk / Return Rank: 11
BWBIX Sharpe Ratio Rank: 11
BWBIX Sortino Ratio Rank: 12
BWBIX Omega Ratio Rank: 11
BWBIX Calmar Ratio Rank: 11
BWBIX Martin Ratio Rank: 12

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.

NSOIX vs. BWBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for North Star Opportunity Fund (NSOIX) 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.

	NSOIX	BWBIX	Difference
Sharpe ratio Return per unit of total volatility	2.81	0.85	+1.96
Sortino ratio Return per unit of downside risk	3.96	1.37	+2.60
Omega ratio Gain probability vs. loss probability	1.49	1.16	+0.33
Calmar ratio Return relative to maximum drawdown	4.02	1.05	+2.96
Martin ratio Return relative to average drawdown	15.11	3.47	+11.65
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NSOIX vs. BWBIX - Sharpe Ratio Comparison

The current NSOIX Sharpe Ratio is 2.81, which is higher than the BWBIX Sharpe Ratio of 0.85. The chart below compares the historical Sharpe Ratios of NSOIX 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

	NSOIX	BWBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.81	0.85	+1.96
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	0.22	+0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.63	0.53	+0.10

Drawdowns

NSOIX vs. BWBIX - Drawdown Comparison

The maximum NSOIX drawdown since its inception was -33.29%, smaller than the maximum BWBIX drawdown of -39.14%. Use the drawdown chart below to compare losses from any high point for NSOIX and BWBIX.

Drawdown Indicators

	NSOIX	BWBIX	Difference
Max Drawdown Largest peak-to-trough decline	-33.29%	-39.14%	+5.85%
Max Drawdown (1Y) Largest decline over 1 year	-7.38%	-11.65%	+4.27%
Max Drawdown (3Y) Largest decline over 3 years	-18.24%	-21.59%	+3.35%
Max Drawdown (5Y) Largest decline over 5 years	-27.89%	-39.14%	+11.25%
Max Drawdown (10Y) Largest decline over 10 years	-33.29%	—	—
Current Drawdown Current decline from peak	-0.45%	-1.26%	+0.81%
Average Drawdown Average peak-to-trough decline	-6.51%	-11.72%	+5.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.96%	3.53%	-1.57%

Volatility

NSOIX vs. BWBIX - Volatility Comparison

North Star Opportunity Fund (NSOIX) and Baron WealthBuilder Fund (BWBIX) have volatilities of 3.31% and 3.38%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NSOIX	BWBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.31%	3.38%	-0.07%
Volatility (6M) Calculated over the trailing 6-month period	7.54%	10.99%	-3.45%
Volatility (1Y) Calculated over the trailing 1-year period	10.54%	14.36%	-3.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.55%	21.08%	-6.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.61%	23.14%	-7.53%

NSOIX vs. BWBIX - Expense Ratio Comparison

NSOIX has a 1.30% expense ratio, which is higher than BWBIX's 0.05% expense ratio.

Dividends

NSOIX vs. BWBIX - Dividend Comparison

NSOIX's dividend yield for the trailing twelve months is around 5.68%, less than BWBIX's 7.55% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BWBIX Baron WealthBuilder Fund	7.55%	7.61%	0.77%	0.06%	3.21%	3.75%	1.24%	3.51%	0.14%	0.00%	0.00%	0.00%
NSOIX North Star Opportunity Fund	5.68%	6.13%	4.08%	2.66%	4.68%	2.38%	0.52%	1.36%	6.81%	1.62%	1.03%	2.53%

Frequently Asked Questions

Can I hold both NSOIX and BWBIX in my portfolio?

NSOIX and BWBIX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NSOIX or BWBIX?

BWBIX has higher volatility (3.38%) compared to NSOIX (3.31%). In terms of maximum drawdown, NSOIX dropped -33.29% vs BWBIX's -39.14%.

Which has better risk-adjusted returns?

NSOIX currently has the higher Sharpe Ratio (2.81 vs 0.85), 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.