BTSMX vs. BOSOX

Last updated Jun 4, 2026

BTSMX (Boston Trust SMID Cap Fund) and BOSOX (Boston Trust Small Cap Fund) are both mutual funds - BTSMX is a Mid Cap Blend Equities fund managed by Boston Trust Walden, while BOSOX is a Small Cap Blend Equities fund managed by Boston Trust Walden. Over the past 10 years, BTSMX returned 10.42%/yr vs 10.23%/yr for BOSOX. With a 0.96 correlation, they move nearly in lockstep. BTSMX charges 0.75%/yr vs 1.00%/yr for BOSOX.

Performance

BTSMX vs. BOSOX - Performance Comparison

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

Returns By Period

In the year-to-date period, BTSMX achieves a 2.52% return, which is significantly lower than BOSOX's 6.63% return. Both investments have delivered pretty close results over the past 10 years, with BTSMX having a 10.42% annualized return and BOSOX not far behind at 10.23%.

BTSMX

• 1D: 0.28%
• 1M: 1.82%
• YTD: 2.52%
• 6M: 2.31%
• 1Y: 5.33%
• 3Y*: 8.71%
• 5Y*: 5.64%
• 10Y*: 10.42%

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%

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

BTSMX vs. BOSOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BTSMX Boston Trust SMID Cap Fund	2.52%	0.72%	10.16%	13.14%	-12.02%	35.06%	8.27%	30.51%	-5.63%	17.69%
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%

Correlation

The correlation between BTSMX and BOSOX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Dec 2, 2011	0.96

The correlation between BTSMX and BOSOX has been stable across timeframes, ranging from 0.91 to 0.96 - a consistent structural relationship.

Return for Risk

BTSMX vs. BOSOX — Risk / Return Rank

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

BTSMX

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

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

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.

BTSMX vs. BOSOX - Risk-Adjusted Trends Comparison

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

	BTSMX	BOSOX	Difference
Sharpe ratio: Return per unit of total volatility	0.50	0.53	-0.03
Sortino ratio: Return per unit of downside risk	0.84	0.89	-0.05
Omega ratio: Gain probability vs. loss probability	1.09	1.10	-0.01
Calmar ratio: Return relative to maximum drawdown	0.72	0.74	-0.02
Martin ratio: Return relative to average drawdown	2.01	2.22	-0.21
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BTSMX vs. BOSOX - Sharpe Ratio Comparison

The current BTSMX Sharpe Ratio is 0.50, which is comparable to the BOSOX Sharpe Ratio of 0.53. The chart below compares the historical Sharpe Ratios of BTSMX and BOSOX, 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

	BTSMX	BOSOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.50	0.53	-0.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.28	+0.06
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.57	0.53	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.43	+0.18

Drawdowns

BTSMX vs. BOSOX - Drawdown Comparison

The maximum BTSMX drawdown since its inception was -38.04%, smaller than the maximum BOSOX drawdown of -51.32%. Use the drawdown chart below to compare losses from any high point for BTSMX and BOSOX.

Drawdown Indicators

	BTSMX	BOSOX	Difference
Max Drawdown Largest peak-to-trough decline	-38.04%	-51.32%	+13.28%
Max Drawdown (1Y) Largest decline over 1 year	-8.74%	-10.69%	+1.95%
Max Drawdown (3Y) Largest decline over 3 years	-20.28%	-22.36%	+2.08%
Max Drawdown (5Y) Largest decline over 5 years	-21.46%	-22.36%	+0.90%
Max Drawdown (10Y) Largest decline over 10 years	-38.04%	-36.79%	-1.25%
Current Drawdown Current decline from peak	-4.85%	-6.67%	+1.82%
Average Drawdown Average peak-to-trough decline	-4.99%	-7.27%	+2.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.12%	3.57%	-0.45%

Volatility

BTSMX vs. BOSOX - Volatility Comparison

The current volatility for Boston Trust SMID Cap Fund (BTSMX) is 2.61%, while Boston Trust Small Cap Fund (BOSOX) has a volatility of 3.90%. This indicates that BTSMX experiences smaller price fluctuations and is considered to be less risky than BOSOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BTSMX	BOSOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.61%	3.90%	-1.29%
Volatility (6M) Calculated over the trailing 6-month period	8.33%	10.08%	-1.75%
Volatility (1Y) Calculated over the trailing 1-year period	12.62%	15.10%	-2.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.76%	17.82%	-1.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.38%	19.56%	-1.18%

BTSMX vs. BOSOX - Expense Ratio Comparison

BTSMX has a 0.75% expense ratio, which is lower than BOSOX's 1.00% expense ratio.

Dividends

BTSMX vs. BOSOX - Dividend Comparison

BTSMX's dividend yield for the trailing twelve months is around 2.00%, less than BOSOX's 4.14% 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%
BTSMX Boston Trust SMID Cap Fund	2.00%	2.05%	2.20%	0.79%	4.15%	6.35%	0.77%	6.33%	1.95%	0.47%	6.36%	7.34%

Frequently Asked Questions

Can I hold both BTSMX and BOSOX in my portfolio?

With a correlation of 0.91, BTSMX and BOSOX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, BTSMX or BOSOX?

BOSOX has higher volatility (3.90%) compared to BTSMX (2.61%). In terms of maximum drawdown, BTSMX dropped -38.04% vs BOSOX's -51.32%.

Which has better risk-adjusted returns?

BOSOX currently has the higher Sharpe Ratio (0.53 vs 0.50), 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.