BTSMX vs. FSMAX

Last updated Jun 20, 2026

BTSMX (Boston Trust SMID Cap Fund) and FSMAX (Fidelity Extended Market Index Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, BTSMX returned 10.64%/yr vs 12.31%/yr for FSMAX. Their correlation of 0.90 suggests significant overlap in exposure. BTSMX charges 0.75%/yr vs 0.04%/yr for FSMAX.

Performance

BTSMX vs. FSMAX - Performance Comparison

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

Returns By Period

In the year-to-date period, BTSMX achieves a 4.07% return, which is significantly lower than FSMAX's 15.56% return. Over the past 10 years, BTSMX has underperformed FSMAX with an annualized return of 10.64%, while FSMAX has yielded a comparatively higher 12.31% annualized return.

BTSMX

• 1D: 1.03%
• 1M: 1.51%
• YTD: 4.07%
• 6M: 2.94%
• 1Y: 8.29%
• 3Y*: 8.26%
• 5Y*: 6.44%
• 10Y*: 10.64%

FSMAX

• 1D: 1.67%
• 1M: 4.32%
• YTD: 15.56%
• 6M: 12.55%
• 1Y: 30.47%
• 3Y*: 19.09%
• 5Y*: 6.93%
• 10Y*: 12.31%

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

BTSMX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BTSMX Boston Trust SMID Cap Fund	4.07%	0.72%	10.16%	13.14%	-12.02%	35.06%	8.27%	30.51%	-5.63%	17.69%
FSMAX Fidelity Extended Market Index Fund	15.56%	11.40%	16.99%	25.36%	-26.44%	12.41%	32.28%	28.01%	-9.44%	18.04%

Correlation

The correlation between BTSMX and FSMAX is 0.77, 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	0.77
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Dec 1, 2011	0.90

The correlation between BTSMX and FSMAX shifts across timeframes, from 0.77 (1 year) to 0.90 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BTSMX vs. FSMAX — Risk / Return Rank

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

BTSMX

BTSMX Risk / Return Rank: 10
BTSMX Sharpe Ratio Rank: 9
BTSMX Sortino Ratio Rank: 10
BTSMX Omega Ratio Rank: 9
BTSMX Calmar Ratio Rank: 11
BTSMX Martin Ratio Rank: 10

FSMAX

FSMAX Risk / Return Rank: 46
FSMAX Sharpe Ratio Rank: 40
FSMAX Sortino Ratio Rank: 38
FSMAX Omega Ratio Rank: 35
FSMAX Calmar Ratio Rank: 65
FSMAX 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.

BTSMX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Trust SMID Cap Fund (BTSMX) and Fidelity Extended Market Index Fund (FSMAX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	BTSMX	FSMAX	Difference
Sharpe ratio: Return per unit of total volatility	0.66	1.71	-1.05
Sortino ratio: Return per unit of downside risk	1.08	2.38	-1.31
Omega ratio: Gain probability vs. loss probability	1.12	1.29	-0.17
Calmar ratio: Return relative to maximum drawdown	0.95	2.96	-2.01
Martin ratio: Return relative to average drawdown	2.66	10.38	-7.73

BTSMX vs. FSMAX - Sharpe Ratio Comparison

The current BTSMX Sharpe Ratio is 0.66, which is lower than the FSMAX Sharpe Ratio of 1.71. The chart below compares the historical Sharpe Ratios of BTSMX and FSMAX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BTSMX vs. FSMAX - Drawdown Comparison

The maximum BTSMX drawdown since its inception was -38.04%, smaller than the maximum FSMAX drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for BTSMX and FSMAX.

Drawdown Indicators

	BTSMX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-38.04%	-50.55%	+12.51%
Max Drawdown (1Y) Largest decline over 1 year	-8.74%	-10.26%	+1.52%
Max Drawdown (3Y) Largest decline over 3 years	-20.28%	-26.82%	+6.54%
Max Drawdown (5Y) Largest decline over 5 years	-21.46%	-36.31%	+14.85%
Max Drawdown (10Y) Largest decline over 10 years	-38.04%	-50.55%	+12.51%
Current Drawdown Current decline from peak	-3.41%	-0.11%	-3.30%
Average Drawdown Average peak-to-trough decline	-4.99%	-12.13%	+7.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.13%	2.92%	+0.21%

Volatility

BTSMX vs. FSMAX - Volatility Comparison

The current volatility for Boston Trust SMID Cap Fund (BTSMX) is 3.27%, while Fidelity Extended Market Index Fund (FSMAX) has a volatility of 6.36%. This indicates that BTSMX experiences smaller price fluctuations and is considered to be less risky than FSMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BTSMX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.27%	6.36%	-3.09%
Volatility (6M) Calculated over the trailing 6-month period	8.51%	13.32%	-4.81%
Volatility (1Y) Calculated over the trailing 1-year period	12.65%	17.80%	-5.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.77%	22.44%	-5.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.39%	30.27%	-11.88%

BTSMX vs. FSMAX - Expense Ratio Comparison

BTSMX has a 0.75% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

Dividends

BTSMX vs. FSMAX - Dividend Comparison

BTSMX's dividend yield for the trailing twelve months is around 1.97%, more than FSMAX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BTSMX Boston Trust SMID Cap Fund	1.97%	2.05%	2.20%	0.79%	4.15%	6.35%	0.77%	6.33%	1.95%	0.47%	6.36%	7.34%
FSMAX Fidelity Extended Market Index Fund	0.50%	0.57%	0.48%	1.17%	1.90%	7.49%	2.14%	4.30%	6.09%	5.44%	4.85%	6.34%

Frequently Asked Questions

Can I hold both BTSMX and FSMAX in my portfolio?

BTSMX and FSMAX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BTSMX or FSMAX?

FSMAX has higher volatility (6.36%) compared to BTSMX (3.27%). In terms of maximum drawdown, BTSMX dropped -38.04% vs FSMAX's -50.55%.

Which has better risk-adjusted returns?

FSMAX currently has the higher Sharpe Ratio (1.71 vs 0.66), 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.