BTMFX vs. FSMDX

Last updated Jun 4, 2026

BTMFX (Boston Trust Midcap Fund) and FSMDX (Fidelity Mid Cap Index Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, BTMFX returned 10.08%/yr vs 11.69%/yr for FSMDX. Their correlation of 0.94 suggests significant overlap in exposure. BTMFX charges 1.00%/yr vs 0.03%/yr for FSMDX.

Performance

BTMFX vs. FSMDX - Performance Comparison

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

Returns By Period

In the year-to-date period, BTMFX achieves a 1.92% return, which is significantly lower than FSMDX's 12.78% return. Over the past 10 years, BTMFX has underperformed FSMDX with an annualized return of 10.08%, while FSMDX has yielded a comparatively higher 11.69% annualized return.

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%

FSMDX

• 1D: 0.70%
• 1M: 4.12%
• YTD: 12.78%
• 6M: 12.57%
• 1Y: 22.14%
• 3Y*: 17.58%
• 5Y*: 8.41%
• 10Y*: 11.69%

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

BTMFX vs. FSMDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
FSMDX Fidelity Mid Cap Index Fund	12.78%	10.58%	15.55%	17.20%	-17.27%	22.56%	17.13%	30.53%	-9.38%	18.04%

Correlation

The correlation between BTMFX and FSMDX is 0.88, 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	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Sep 12, 2011	0.94

The correlation between BTMFX and FSMDX has been stable across timeframes, ranging from 0.88 to 0.94 - a consistent structural relationship.

Return for Risk

BTMFX vs. FSMDX — Risk / Return Rank

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

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

FSMDX

FSMDX Risk / Return Rank: 43
FSMDX Sharpe Ratio Rank: 37
FSMDX Sortino Ratio Rank: 36
FSMDX Omega Ratio Rank: 33
FSMDX Calmar Ratio Rank: 56
FSMDX Martin Ratio Rank: 55

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.

BTMFX vs. FSMDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Trust Midcap Fund (BTMFX) and Fidelity Mid Cap Index Fund (FSMDX). 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.

	BTMFX	FSMDX	Difference
Sharpe ratio: Return per unit of total volatility	0.56	1.75	-1.19
Sortino ratio: Return per unit of downside risk	0.91	2.51	-1.60
Omega ratio: Gain probability vs. loss probability	1.10	1.30	-0.20
Calmar ratio: Return relative to maximum drawdown	0.84	2.87	-2.03
Martin ratio: Return relative to average drawdown	2.35	11.06	-8.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BTMFX vs. FSMDX - Sharpe Ratio Comparison

The current BTMFX Sharpe Ratio is 0.56, which is lower than the FSMDX Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of BTMFX and FSMDX, 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

	BTMFX	FSMDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.56	1.75	-1.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	0.46	-0.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	0.61	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.70	-0.22

Drawdowns

BTMFX vs. FSMDX - Drawdown Comparison

The maximum BTMFX drawdown since its inception was -49.26%, which is greater than FSMDX's maximum drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for BTMFX and FSMDX.

Drawdown Indicators

	BTMFX	FSMDX	Difference
Max Drawdown Largest peak-to-trough decline	-49.26%	-40.35%	-8.91%
Max Drawdown (1Y) Largest decline over 1 year	-7.79%	-8.16%	+0.37%
Max Drawdown (3Y) Largest decline over 3 years	-17.77%	-20.92%	+3.15%
Max Drawdown (5Y) Largest decline over 5 years	-20.79%	-26.07%	+5.28%
Max Drawdown (10Y) Largest decline over 10 years	-37.14%	-40.35%	+3.21%
Current Drawdown Current decline from peak	-2.54%	0.00%	-2.54%
Average Drawdown Average peak-to-trough decline	-6.16%	-4.96%	-1.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.80%	2.11%	+0.69%

Volatility

BTMFX vs. FSMDX - Volatility Comparison

The current volatility for Boston Trust Midcap Fund (BTMFX) is 2.88%, while Fidelity Mid Cap Index Fund (FSMDX) has a volatility of 3.31%. This indicates that BTMFX experiences smaller price fluctuations and is considered to be less risky than FSMDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BTMFX	FSMDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.88%	3.31%	-0.43%
Volatility (6M) Calculated over the trailing 6-month period	7.99%	9.93%	-1.94%
Volatility (1Y) Calculated over the trailing 1-year period	11.80%	13.42%	-1.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.75%	18.26%	-2.51%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.44%	19.32%	-1.88%

BTMFX vs. FSMDX - Expense Ratio Comparison

BTMFX has a 1.00% expense ratio, which is higher than FSMDX's 0.03% expense ratio.

Dividends

BTMFX vs. FSMDX - Dividend Comparison

BTMFX's dividend yield for the trailing twelve months is around 10.66%, more than FSMDX's 0.98% 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%
FSMDX Fidelity Mid Cap Index Fund	0.98%	1.10%	2.46%	1.39%	2.07%	3.35%	2.34%	2.86%	2.21%	2.17%	2.23%	2.84%

Frequently Asked Questions

Can I hold both BTMFX and FSMDX in my portfolio?

BTMFX and FSMDX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BTMFX or FSMDX?

FSMDX has higher volatility (3.31%) compared to BTMFX (2.88%). In terms of maximum drawdown, BTMFX dropped -49.26% vs FSMDX's -40.35%.

Which has better risk-adjusted returns?

FSMDX currently has the higher Sharpe Ratio (1.75 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.