BDSIX vs. FSSNX

Last updated Jun 4, 2026

BDSIX (BlackRock Advantage Small Cap Core Fund) and FSSNX (Fidelity Small Cap Index Fund) are both Small Cap Blend Equities funds. Over the past 10 years, BDSIX returned 12.09%/yr vs 11.22%/yr for FSSNX. With a 0.99 correlation, they move nearly in lockstep. BDSIX charges 0.50%/yr vs 0.03%/yr for FSSNX.

Performance

BDSIX vs. FSSNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Advantage Small Cap Core Fund (BDSIX) 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, BDSIX achieves a 20.52% return, which is significantly higher than FSSNX's 18.72% return. Over the past 10 years, BDSIX has outperformed FSSNX with an annualized return of 12.09%, while FSSNX has yielded a comparatively lower 11.22% annualized return.

BDSIX

• 1D: 1.18%
• 1M: 4.42%
• YTD: 20.52%
• 6M: 19.38%
• 1Y: 43.37%
• 3Y*: 20.29%
• 5Y*: 7.55%
• 10Y*: 12.09%

FSSNX

• 1D: 0.91%
• 1M: 4.97%
• YTD: 18.72%
• 6M: 17.45%
• 1Y: 41.33%
• 3Y*: 18.75%
• 5Y*: 6.72%
• 10Y*: 11.22%

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

BDSIX vs. FSSNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BDSIX BlackRock Advantage Small Cap Core Fund	20.52%	13.72%	11.86%	16.53%	-19.33%	14.82%	19.56%	32.12%	-8.82%	10.31%
FSSNX Fidelity Small Cap Index Fund	18.72%	12.94%	11.71%	17.11%	-20.28%	14.70%	19.99%	25.70%	-11.24%	14.54%

Correlation

The correlation between BDSIX and FSSNX is 0.99 - 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	0.99
Correlation (3Y) Calculated over the trailing 3-year period	0.99
Correlation (5Y) Calculated over the trailing 5-year period	0.99
Correlation (10Y) Calculated over the trailing 10-year period	0.99
Correlation (All Time) Calculated using the full available price history since Jan 3, 2014	0.99

The correlation between BDSIX and FSSNX has been stable across timeframes, ranging from 0.99 to 0.99 - a consistent structural relationship.

Return for Risk

BDSIX vs. FSSNX — Risk / Return Rank

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

BDSIX

BDSIX Risk / Return Rank: 71
BDSIX Sharpe Ratio Rank: 67
BDSIX Sortino Ratio Rank: 59
BDSIX Omega Ratio Rank: 51
BDSIX Calmar Ratio Rank: 90
BDSIX Martin Ratio Rank: 86

FSSNX

FSSNX Risk / Return Rank: 64
FSSNX Sharpe Ratio Rank: 61
FSSNX Sortino Ratio Rank: 55
FSSNX Omega Ratio Rank: 47
FSSNX Calmar Ratio Rank: 85
FSSNX Martin Ratio Rank: 74

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.

BDSIX vs. FSSNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Advantage Small Cap Core Fund (BDSIX) 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.

	BDSIX	FSSNX	Difference
Sharpe ratio: Return per unit of total volatility	2.39	2.29	+0.10
Sortino ratio: Return per unit of downside risk	3.24	3.14	+0.10
Omega ratio: Gain probability vs. loss probability	1.39	1.37	+0.02
Calmar ratio: Return relative to maximum drawdown	4.62	3.98	+0.64
Martin ratio: Return relative to average drawdown	16.54	14.13	+2.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BDSIX vs. FSSNX - Sharpe Ratio Comparison

The current BDSIX Sharpe Ratio is 2.39, which is comparable to the FSSNX Sharpe Ratio of 2.29. The chart below compares the historical Sharpe Ratios of BDSIX 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.

Sharpe Ratios by Period

	BDSIX	FSSNX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.39	2.29	+0.10
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.30	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.52	0.48	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	0.46	0.54	-0.07

Drawdowns

BDSIX vs. FSSNX - Drawdown Comparison

The maximum BDSIX drawdown since its inception was -43.36%, roughly equal to the maximum FSSNX drawdown of -41.72%. Use the drawdown chart below to compare losses from any high point for BDSIX and FSSNX.

Drawdown Indicators

	BDSIX	FSSNX	Difference
Max Drawdown Largest peak-to-trough decline	-43.36%	-41.72%	-1.64%
Max Drawdown (1Y) Largest decline over 1 year	-9.89%	-11.00%	+1.11%
Max Drawdown (3Y) Largest decline over 3 years	-26.59%	-27.45%	+0.86%
Max Drawdown (5Y) Largest decline over 5 years	-31.66%	-31.87%	+0.21%
Max Drawdown (10Y) Largest decline over 10 years	-43.36%	-41.72%	-1.64%
Current Drawdown Current decline from peak	0.00%	-0.14%	+0.14%
Average Drawdown Average peak-to-trough decline	-8.61%	-8.29%	-0.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.75%	3.09%	-0.34%

Volatility

BDSIX vs. FSSNX - Volatility Comparison

BlackRock Advantage Small Cap Core Fund (BDSIX) and Fidelity Small Cap Index Fund (FSSNX) have volatilities of 5.39% and 5.59%, 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

	BDSIX	FSSNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.39%	5.59%	-0.20%
Volatility (6M) Calculated over the trailing 6-month period	13.61%	13.59%	+0.02%
Volatility (1Y) Calculated over the trailing 1-year period	19.11%	19.13%	-0.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.58%	22.58%	0.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.40%	23.45%	-0.05%

BDSIX vs. FSSNX - Expense Ratio Comparison

BDSIX has a 0.50% expense ratio, which is higher than FSSNX's 0.03% expense ratio.

Dividends

BDSIX vs. FSSNX - Dividend Comparison

BDSIX's dividend yield for the trailing twelve months is around 3.95%, more than FSSNX's 0.91% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BDSIX BlackRock Advantage Small Cap Core Fund	3.95%	4.76%	0.76%	0.96%	3.51%	12.04%	2.56%	0.88%	5.67%	2.32%	0.34%	5.72%
FSSNX Fidelity Small Cap Index Fund	0.91%	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 BDSIX and FSSNX in my portfolio?

With a correlation of 0.99, BDSIX 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, BDSIX or FSSNX?

FSSNX has higher volatility (5.59%) compared to BDSIX (5.39%). In terms of maximum drawdown, BDSIX dropped -43.36% vs FSSNX's -41.72%.

Which has better risk-adjusted returns?

BDSIX currently has the higher Sharpe Ratio (2.39 vs 2.29), 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.