BIAYX vs. FSSNX

Last updated Jun 23, 2026

BIAYX (Brown Advisory Sustainable Small-Cap Core Fund) and FSSNX (Fidelity Small Cap Index Fund) are both Small Cap Blend Equities funds. Over the past 3 years, BIAYX returned 14.30%/yr vs 18.44%/yr for FSSNX. With a 0.95 correlation, they move nearly in lockstep. BIAYX charges 1.08%/yr vs 0.03%/yr for FSSNX.

Performance

BIAYX vs. FSSNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Brown Advisory Sustainable Small-Cap Core Fund (BIAYX) and Fidelity Small Cap Index Fund (FSSNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BIAYX achieves a 16.03% return, which is significantly lower than FSSNX's 20.76% return.

BIAYX

• 1D: 1.89%
• 1M: 4.47%
• YTD: 16.03%
• 6M: 13.89%
• 1Y: 29.92%
• 3Y*: 14.30%
• 5Y*: —
• 10Y*: —

FSSNX

• 1D: 2.10%
• 1M: 3.98%
• YTD: 20.76%
• 6M: 17.19%
• 1Y: 43.21%
• 3Y*: 18.44%
• 5Y*: 7.47%
• 10Y*: 11.46%

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

BIAYX vs. FSSNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
BIAYX Brown Advisory Sustainable Small-Cap Core Fund	16.03%	9.44%	6.80%	17.39%	-20.21%	1.09%
FSSNX Fidelity Small Cap Index Fund	20.76%	12.94%	11.71%	17.11%	-20.28%	0.02%

Correlation

The correlation between BIAYX and FSSNX is 0.90, 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	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (All Time) Calculated using the full available price history since Oct 8, 2021	0.95

The correlation between BIAYX and FSSNX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.

Return for Risk

BIAYX vs. FSSNX — Risk / Return Rank

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

BIAYX

BIAYX Risk / Return Rank: 45
BIAYX Sharpe Ratio Rank: 40
BIAYX Sortino Ratio Rank: 43
BIAYX Omega Ratio Rank: 36
BIAYX Calmar Ratio Rank: 56
BIAYX Martin Ratio Rank: 49

FSSNX

FSSNX Risk / Return Rank: 69
FSSNX Sharpe Ratio Rank: 66
FSSNX Sortino Ratio Rank: 62
FSSNX Omega Ratio Rank: 50
FSSNX Calmar Ratio Rank: 86
FSSNX Martin Ratio Rank: 80

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.

BIAYX vs. FSSNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Brown Advisory Sustainable Small-Cap Core Fund (BIAYX) and Fidelity Small Cap Index Fund (FSSNX). 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.

	BIAYX	FSSNX	Difference
Sharpe ratio: Return per unit of total volatility	1.72	2.19	-0.47
Sortino ratio: Return per unit of downside risk	2.54	2.99	-0.46
Omega ratio: Gain probability vs. loss probability	1.30	1.36	-0.06
Calmar ratio: Return relative to maximum drawdown	2.73	3.92	-1.20
Martin ratio: Return relative to average drawdown	9.49	13.88	-4.40

BIAYX vs. FSSNX - Sharpe Ratio Comparison

The current BIAYX Sharpe Ratio is 1.72, which is comparable to the FSSNX Sharpe Ratio of 2.19. The chart below compares the historical Sharpe Ratios of BIAYX and FSSNX, 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

BIAYX vs. FSSNX - Drawdown Comparison

The maximum BIAYX drawdown since its inception was -31.81%, smaller than the maximum FSSNX drawdown of -41.72%. Use the drawdown chart below to compare losses from any high point for BIAYX and FSSNX.

Drawdown Indicators

	BIAYX	FSSNX	Difference
Max Drawdown Largest peak-to-trough decline	-31.81%	-41.72%	+9.91%
Max Drawdown (1Y) Largest decline over 1 year	-11.02%	-11.00%	-0.02%
Max Drawdown (3Y) Largest decline over 3 years	-23.51%	-27.45%	+3.94%
Max Drawdown (5Y) Largest decline over 5 years	—	-31.87%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-41.72%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-12.67%	-8.27%	-4.40%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.16%	3.10%	+0.06%

Volatility

BIAYX vs. FSSNX - Volatility Comparison

The current volatility for Brown Advisory Sustainable Small-Cap Core Fund (BIAYX) is 5.81%, while Fidelity Small Cap Index Fund (FSSNX) has a volatility of 6.79%. This indicates that BIAYX experiences smaller price fluctuations and is considered to be less risky than FSSNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BIAYX	FSSNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.81%	6.79%	-0.98%
Volatility (6M) Calculated over the trailing 6-month period	12.87%	14.37%	-1.50%
Volatility (1Y) Calculated over the trailing 1-year period	17.52%	19.71%	-2.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.70%	22.68%	-1.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.70%	23.50%	-2.80%

BIAYX vs. FSSNX - Expense Ratio Comparison

BIAYX has a 1.08% expense ratio, which is higher than FSSNX's 0.03% expense ratio.

Dividends

BIAYX vs. FSSNX - Dividend Comparison

BIAYX's dividend yield for the trailing twelve months is around 3.77%, more than FSSNX's 0.90% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIAYX Brown Advisory Sustainable Small-Cap Core Fund	3.77%	4.37%	0.73%	0.01%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FSSNX Fidelity Small Cap Index Fund	0.90%	1.08%	1.04%	1.43%	1.26%	3.92%	0.94%	2.96%	4.94%	3.37%	2.27%	2.66%

Frequently Asked Questions

Can I hold both BIAYX and FSSNX in my portfolio?

With a correlation of 0.90, BIAYX and FSSNX 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, BIAYX or FSSNX?

FSSNX has higher volatility (6.79%) compared to BIAYX (5.81%). In terms of maximum drawdown, BIAYX dropped -31.81% vs FSSNX's -41.72%.

Which has better risk-adjusted returns?

FSSNX currently has the higher Sharpe Ratio (2.19 vs 1.72), 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.