BBMIX vs. FSMAX

Last updated Apr 2, 2026

Compare and contrast key facts about BBH Select Series - Mid Cap Fund (BBMIX) and Fidelity Extended Market Index Fund (FSMAX).

BBMIX is managed by BBH. It was launched on May 23, 2021. FSMAX is managed by Fidelity.

Performance

BBMIX vs. FSMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BBH Select Series - Mid Cap Fund (BBMIX) and Fidelity Extended Market Index Fund (FSMAX). The values are adjusted to include any dividend payments, if applicable.

BBMIX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
BBMIX BBH Select Series - Mid Cap Fund	2.86%	-6.45%	11.41%	26.01%	-24.76%	13.50%
FSMAX Fidelity Extended Market Index Fund	-1.26%	11.40%	16.99%	25.36%	-26.44%	2.40%

Returns By Period

In the year-to-date period, BBMIX achieves a 2.86% return, which is significantly higher than FSMAX's -1.26% return.

BBMIX

• 1D: 0.00%
• 1M: 2.86%
• YTD: 2.86%
• 6M: -2.21%
• 1Y: 2.13%
• 3Y*: 7.96%
• 5Y*: —
• 10Y*: —

FSMAX

• 1D: 3.43%
• 1M: -5.35%
• YTD: -1.26%
• 6M: -1.38%
• 1Y: 20.12%
• 3Y*: 15.07%
• 5Y*: 4.00%
• 10Y*: 10.91%

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

BBMIX vs. FSMAX - Expense Ratio Comparison

BBMIX has a 0.90% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

BBMIX

BBH Select Series - Mid Cap Fund

FSMAX

Fidelity Extended Market Index Fund

Return for Risk

BBMIX vs. FSMAX — Risk / Return Rank

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

BBMIX

BBMIX Risk / Return Rank: 5
BBMIX Sharpe Ratio Rank: 5
BBMIX Sortino Ratio Rank: 6
BBMIX Omega Ratio Rank: 7
BBMIX Calmar Ratio Rank: 2
BBMIX Martin Ratio Rank: 2

FSMAX

FSMAX Risk / Return Rank: 49
FSMAX Sharpe Ratio Rank: 42
FSMAX Sortino Ratio Rank: 47
FSMAX Omega Ratio Rank: 42
FSMAX Calmar Ratio Rank: 57
FSMAX Martin Ratio Rank: 59

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.

BBMIX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BBH Select Series - Mid Cap Fund (BBMIX) 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.

	BBMIX	FSMAX	Difference
Sharpe ratio Return per unit of total volatility	0.15	0.91	-0.76
Sortino ratio Return per unit of downside risk	0.37	1.40	-1.04
Omega ratio Gain probability vs. loss probability	1.06	1.19	-0.13
Calmar ratio Return relative to maximum drawdown	-0.23	1.39	-1.62
Martin ratio Return relative to average drawdown	-0.55	5.70	-6.25
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BBMIX vs. FSMAX - Sharpe Ratio Comparison

The current BBMIX Sharpe Ratio is 0.15, which is lower than the FSMAX Sharpe Ratio of 0.91. The chart below compares the historical Sharpe Ratios of BBMIX and FSMAX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	BBMIX	FSMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.15	0.91	-0.76
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.18	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.36	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	0.42	-0.27

Correlation

The correlation between BBMIX and FSMAX is 0.86, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

BBMIX vs. FSMAX - Dividend Comparison

BBMIX has not paid dividends to shareholders, while FSMAX's dividend yield for the trailing twelve months is around 0.58%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BBMIX BBH Select Series - Mid Cap Fund	0.00%	0.00%	0.32%	0.10%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FSMAX Fidelity Extended Market Index Fund	0.58%	0.57%	0.48%	1.17%	1.90%	7.49%	2.14%	4.30%	6.09%	5.44%	4.85%	6.34%

Drawdowns

BBMIX vs. FSMAX - Drawdown Comparison

The maximum BBMIX drawdown since its inception was -28.90%, smaller than the maximum FSMAX drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for BBMIX and FSMAX.

Drawdown Indicators

	BBMIX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-28.90%	-50.55%	+21.65%
Max Drawdown (1Y) Largest decline over 1 year	-13.27%	-14.64%	+1.37%
Max Drawdown (5Y) Largest decline over 5 years	—	-36.31%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-50.55%	—
Current Drawdown Current decline from peak	-11.28%	-7.18%	-4.10%
Average Drawdown Average peak-to-trough decline	-10.49%	-12.29%	+1.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.15%	3.57%	+5.58%

Volatility

BBMIX vs. FSMAX - Volatility Comparison

The current volatility for BBH Select Series - Mid Cap Fund (BBMIX) is 2.82%, while Fidelity Extended Market Index Fund (FSMAX) has a volatility of 7.01%. This indicates that BBMIX 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

	BBMIX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.82%	7.01%	-4.19%
Volatility (6M) Calculated over the trailing 6-month period	9.38%	13.51%	-4.13%
Volatility (1Y) Calculated over the trailing 1-year period	20.37%	23.00%	-2.63%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.03%	22.36%	-2.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.03%	30.21%	-10.18%