WAMFX vs. BTMFX

Last updated Jun 4, 2026

WAMFX (Boston Trust Walden Midcap Fund) and BTMFX (Boston Trust Midcap Fund) are both Mid Cap Blend Equities funds from Boston Trust Walden. Over the past 10 years, WAMFX returned 10.22%/yr vs 10.08%/yr for BTMFX. With a 1.00 correlation, they move nearly in lockstep. WAMFX charges 0.99%/yr vs 1.00%/yr for BTMFX.

Performance

WAMFX vs. BTMFX - Performance Comparison

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

Returns By Period

In the year-to-date period, WAMFX achieves a 2.36% return, which is significantly higher than BTMFX's 1.92% return. Both investments have delivered pretty close results over the past 10 years, with WAMFX having a 10.22% annualized return and BTMFX not far behind at 10.08%.

WAMFX

• 1D: 0.35%
• 1M: 2.41%
• YTD: 2.36%
• 6M: 1.96%
• 1Y: 6.50%
• 3Y*: 9.80%
• 5Y*: 6.00%
• 10Y*: 10.22%

BTMFX

• 1D: 0.26%
• 1M: 1.74%
• YTD: 1.92%
• 6M: 1.46%
• 1Y: 5.64%
• 3Y*: 9.29%
• 5Y*: 5.63%
• 10Y*: 10.08%

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

WAMFX vs. BTMFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
WAMFX Boston Trust Walden Midcap Fund	2.36%	4.82%	10.39%	13.90%	-10.87%	24.85%	9.56%	36.98%	-3.59%	16.21%
BTMFX Boston Trust Midcap Fund	1.92%	4.29%	10.27%	13.06%	-10.91%	24.77%	9.72%	33.00%	-3.36%	20.01%

Correlation

The correlation between WAMFX and BTMFX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	1.00
Correlation (All Time) Calculated using the full available price history since Aug 2, 2011	1.00

The correlation between WAMFX and BTMFX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

WAMFX vs. BTMFX — Risk / Return Rank

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

WAMFX

WAMFX Risk / Return Rank: 8
WAMFX Sharpe Ratio Rank: 8
WAMFX Sortino Ratio Rank: 8
WAMFX Omega Ratio Rank: 8
WAMFX Calmar Ratio Rank: 9
WAMFX Martin Ratio Rank: 9

BTMFX

BTMFX Risk / Return Rank: 7
BTMFX Sharpe Ratio Rank: 7
BTMFX Sortino Ratio Rank: 7
BTMFX Omega Ratio Rank: 6
BTMFX Calmar Ratio Rank: 8
BTMFX Martin Ratio Rank: 8

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.

WAMFX vs. BTMFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Trust Walden Midcap Fund (WAMFX) and Boston Trust Midcap Fund (BTMFX). 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.

	WAMFX	BTMFX	Difference
Sharpe ratio: Return per unit of total volatility	0.63	0.56	+0.07
Sortino ratio: Return per unit of downside risk	1.02	0.91	+0.10
Omega ratio: Gain probability vs. loss probability	1.12	1.10	+0.01
Calmar ratio: Return relative to maximum drawdown	0.89	0.84	+0.05
Martin ratio: Return relative to average drawdown	2.58	2.35	+0.23
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WAMFX vs. BTMFX - Sharpe Ratio Comparison

The current WAMFX Sharpe Ratio is 0.63, which is comparable to the BTMFX Sharpe Ratio of 0.56. The chart below compares the historical Sharpe Ratios of WAMFX and BTMFX, 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

	WAMFX	BTMFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.63	0.56	+0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.38	0.36	+0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.58	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.62	0.48	+0.14

Drawdowns

WAMFX vs. BTMFX - Drawdown Comparison

The maximum WAMFX drawdown since its inception was -36.81%, smaller than the maximum BTMFX drawdown of -49.26%. Use the drawdown chart below to compare losses from any high point for WAMFX and BTMFX.

Drawdown Indicators

	WAMFX	BTMFX	Difference
Max Drawdown Largest peak-to-trough decline	-36.81%	-49.26%	+12.45%
Max Drawdown (1Y) Largest decline over 1 year	-8.38%	-7.79%	-0.59%
Max Drawdown (3Y) Largest decline over 3 years	-17.51%	-17.77%	+0.26%
Max Drawdown (5Y) Largest decline over 5 years	-20.82%	-20.79%	-0.03%
Max Drawdown (10Y) Largest decline over 10 years	-36.81%	-37.14%	+0.33%
Current Drawdown Current decline from peak	-2.21%	-2.54%	+0.33%
Average Drawdown Average peak-to-trough decline	-3.94%	-6.16%	+2.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.88%	2.80%	+0.08%

Volatility

WAMFX vs. BTMFX - Volatility Comparison

Boston Trust Walden Midcap Fund (WAMFX) and Boston Trust Midcap Fund (BTMFX) have volatilities of 2.98% and 2.88%, 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

	WAMFX	BTMFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.98%	2.88%	+0.10%
Volatility (6M) Calculated over the trailing 6-month period	8.17%	7.99%	+0.18%
Volatility (1Y) Calculated over the trailing 1-year period	11.91%	11.80%	+0.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.81%	15.75%	+0.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.48%	17.44%	+0.04%

WAMFX vs. BTMFX - Expense Ratio Comparison

WAMFX has a 0.99% expense ratio, which is lower than BTMFX's 1.00% expense ratio.

Dividends

WAMFX vs. BTMFX - Dividend Comparison

WAMFX's dividend yield for the trailing twelve months is around 7.06%, less than BTMFX's 10.66% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BTMFX Boston Trust Midcap Fund	10.66%	10.86%	4.23%	4.41%	4.71%	4.91%	1.98%	6.95%	5.96%	6.61%	7.03%	6.60%
WAMFX Boston Trust Walden Midcap Fund	7.06%	7.23%	3.49%	4.84%	5.55%	4.82%	3.87%	12.83%	7.08%	0.45%	5.06%	5.54%

Frequently Asked Questions

Can I hold both WAMFX and BTMFX in my portfolio?

With a correlation of 1.00, WAMFX and BTMFX 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, WAMFX or BTMFX?

WAMFX has higher volatility (2.98%) compared to BTMFX (2.88%). In terms of maximum drawdown, WAMFX dropped -36.81% vs BTMFX's -49.26%.

Which has better risk-adjusted returns?

WAMFX currently has the higher Sharpe Ratio (0.63 vs 0.56), 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.