BOSOX vs. WSBFX

Last updated Jun 4, 2026

BOSOX (Boston Trust Small Cap Fund) and WSBFX (Boston Trust Walden Balanced Fund) are both mutual funds - BOSOX is a Small Cap Blend Equities fund managed by Boston Trust Walden, while WSBFX is a Diversified Portfolio fund managed by Boston Trust Walden. Over the past 10 years, BOSOX returned 10.23%/yr vs 8.66%/yr for WSBFX. Their correlation of 0.84 suggests significant overlap in exposure. Both charge a 1.00% expense ratio.

Performance

BOSOX vs. WSBFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Boston Trust Small Cap Fund (BOSOX) and Boston Trust Walden Balanced Fund (WSBFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BOSOX achieves a 6.63% return, which is significantly higher than WSBFX's 5.87% return. Over the past 10 years, BOSOX has outperformed WSBFX with an annualized return of 10.23%, while WSBFX has yielded a comparatively lower 8.66% annualized return.

BOSOX

• 1D: 0.80%
• 1M: 2.85%
• YTD: 6.63%
• 6M: 4.71%
• 1Y: 6.71%
• 3Y*: 7.74%
• 5Y*: 4.92%
• 10Y*: 10.23%

WSBFX

• 1D: 0.50%
• 1M: 2.85%
• YTD: 5.87%
• 6M: 5.22%
• 1Y: 17.97%
• 3Y*: 10.36%
• 5Y*: 6.02%
• 10Y*: 8.66%

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

BOSOX vs. WSBFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BOSOX Boston Trust Small Cap Fund	6.63%	-4.04%	12.52%	10.09%	-9.05%	28.10%	8.27%	38.35%	-6.01%	12.24%
WSBFX Boston Trust Walden Balanced Fund	5.87%	10.63%	6.86%	12.21%	-13.64%	19.35%	8.81%	24.56%	-1.90%	13.98%

Correlation

The correlation between BOSOX and WSBFX is 0.71, 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	0.71
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.79
Correlation (All Time) Calculated using the full available price history since Dec 20, 2005	0.84

The correlation between BOSOX and WSBFX shifts across timeframes, from 0.71 (1 year) to 0.84 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BOSOX vs. WSBFX — Risk / Return Rank

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

BOSOX

BOSOX Risk / Return Rank: 7
BOSOX Sharpe Ratio Rank: 6
BOSOX Sortino Ratio Rank: 7
BOSOX Omega Ratio Rank: 6
BOSOX Calmar Ratio Rank: 7
BOSOX Martin Ratio Rank: 7

WSBFX

WSBFX Risk / Return Rank: 64
WSBFX Sharpe Ratio Rank: 65
WSBFX Sortino Ratio Rank: 70
WSBFX Omega Ratio Rank: 61
WSBFX Calmar Ratio Rank: 57
WSBFX Martin Ratio Rank: 69

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.

BOSOX vs. WSBFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Trust Small Cap Fund (BOSOX) and Boston Trust Walden Balanced Fund (WSBFX). 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.

	BOSOX	WSBFX	Difference
Sharpe ratio Return per unit of total volatility	0.53	2.38	-1.85
Sortino ratio Return per unit of downside risk	0.89	3.49	-2.60
Omega ratio Gain probability vs. loss probability	1.10	1.44	-0.34
Calmar ratio Return relative to maximum drawdown	0.74	2.90	-2.15
Martin ratio Return relative to average drawdown	2.22	13.29	-11.07
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BOSOX vs. WSBFX - Sharpe Ratio Comparison

The current BOSOX Sharpe Ratio is 0.53, which is lower than the WSBFX Sharpe Ratio of 2.38. The chart below compares the historical Sharpe Ratios of BOSOX and WSBFX, 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

	BOSOX	WSBFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.53	2.38	-1.85
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.28	0.51	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.53	0.71	-0.18
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.53	-0.10

Drawdowns

BOSOX vs. WSBFX - Drawdown Comparison

The maximum BOSOX drawdown since its inception was -51.32%, which is greater than WSBFX's maximum drawdown of -32.01%. Use the drawdown chart below to compare losses from any high point for BOSOX and WSBFX.

Drawdown Indicators

	BOSOX	WSBFX	Difference
Max Drawdown Largest peak-to-trough decline	-51.32%	-32.01%	-19.31%
Max Drawdown (1Y) Largest decline over 1 year	-10.69%	-6.31%	-4.38%
Max Drawdown (3Y) Largest decline over 3 years	-22.36%	-11.46%	-10.90%
Max Drawdown (5Y) Largest decline over 5 years	-22.36%	-19.94%	-2.42%
Max Drawdown (10Y) Largest decline over 10 years	-36.79%	-24.21%	-12.58%
Current Drawdown Current decline from peak	-6.67%	0.00%	-6.67%
Average Drawdown Average peak-to-trough decline	-7.27%	-4.52%	-2.75%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.57%	1.37%	+2.20%

Volatility

BOSOX vs. WSBFX - Volatility Comparison

Boston Trust Small Cap Fund (BOSOX) has a higher volatility of 3.90% compared to Boston Trust Walden Balanced Fund (WSBFX) at 1.89%. This indicates that BOSOX's price experiences larger fluctuations and is considered to be riskier than WSBFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BOSOX	WSBFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.90%	1.89%	+2.01%
Volatility (6M) Calculated over the trailing 6-month period	10.08%	5.82%	+4.26%
Volatility (1Y) Calculated over the trailing 1-year period	15.10%	7.69%	+7.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.82%	11.93%	+5.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.56%	12.29%	+7.27%

BOSOX vs. WSBFX - Expense Ratio Comparison

Both BOSOX and WSBFX have an expense ratio of 1.00%.

Dividends

BOSOX vs. WSBFX - Dividend Comparison

BOSOX's dividend yield for the trailing twelve months is around 4.14%, less than WSBFX's 7.53% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BOSOX Boston Trust Small Cap Fund	4.14%	4.41%	6.52%	0.78%	5.09%	8.93%	2.56%	12.46%	16.19%	9.13%	3.14%	18.92%
WSBFX Boston Trust Walden Balanced Fund	7.53%	7.97%	4.75%	7.68%	3.66%	3.51%	3.42%	2.30%	2.19%	1.02%	3.06%	7.45%

Frequently Asked Questions

Can I hold both BOSOX and WSBFX in my portfolio?

BOSOX and WSBFX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BOSOX or WSBFX?

BOSOX has higher volatility (3.90%) compared to WSBFX (1.89%). In terms of maximum drawdown, BOSOX dropped -51.32% vs WSBFX's -32.01%.

Which has better risk-adjusted returns?

WSBFX currently has the higher Sharpe Ratio (2.38 vs 0.53), 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.