NBNGX vs. FSMAX

Last updated Jun 5, 2026

NBNGX (SIT Mid Cap Growth Fund) and FSMAX (Fidelity Extended Market Index Fund) are both mutual funds - NBNGX is a Mid Cap Growth Equities fund managed by Sit, while FSMAX is a Mid Cap Blend Equities fund tracking the Dow Jones U.S. Completion Total Stock Market Index. Over the past 10 years, NBNGX returned 16.27%/yr vs 12.06%/yr for FSMAX. Their correlation of 0.92 suggests significant overlap in exposure. NBNGX charges 1.25%/yr vs 0.04%/yr for FSMAX.

Performance

NBNGX vs. FSMAX - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with NBNGX having a 13.28% return and FSMAX slightly higher at 13.74%. Over the past 10 years, NBNGX has outperformed FSMAX with an annualized return of 16.27%, while FSMAX has yielded a comparatively lower 12.06% annualized return.

NBNGX

• 1D: -0.75%
• 1M: 3.80%
• YTD: 13.28%
• 6M: 12.29%
• 1Y: 23.21%
• 3Y*: 34.18%
• 5Y*: 17.10%
• 10Y*: 16.27%

FSMAX

• 1D: -1.00%
• 1M: 3.43%
• YTD: 13.74%
• 6M: 11.91%
• 1Y: 28.69%
• 3Y*: 19.73%
• 5Y*: 6.54%
• 10Y*: 12.06%

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

NBNGX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NBNGX SIT Mid Cap Growth Fund	13.28%	8.72%	74.13%	21.98%	-24.10%	15.78%	33.16%	30.27%	-7.42%	19.01%
FSMAX Fidelity Extended Market Index Fund	13.74%	11.40%	16.99%	25.36%	-26.44%	12.41%	32.28%	28.01%	-9.44%	18.04%

Correlation

The correlation between NBNGX and FSMAX is 0.84, 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	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.92

The correlation between NBNGX and FSMAX has been stable across timeframes, ranging from 0.84 to 0.92 - a consistent structural relationship.

Return for Risk

NBNGX vs. FSMAX — Risk / Return Rank

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

NBNGX

NBNGX Risk / Return Rank: 31
NBNGX Sharpe Ratio Rank: 24
NBNGX Sortino Ratio Rank: 23
NBNGX Omega Ratio Rank: 22
NBNGX Calmar Ratio Rank: 42
NBNGX Martin Ratio Rank: 41

FSMAX

FSMAX Risk / Return Rank: 40
FSMAX Sharpe Ratio Rank: 34
FSMAX Sortino Ratio Rank: 32
FSMAX Omega Ratio Rank: 30
FSMAX Calmar Ratio Rank: 54
FSMAX Martin Ratio Rank: 48

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.

NBNGX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SIT Mid Cap Growth Fund (NBNGX) 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.

	NBNGX	FSMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.37	1.69	-0.31
Sortino ratio: Return per unit of downside risk	1.97	2.38	-0.41
Omega ratio: Gain probability vs. loss probability	1.24	1.29	-0.05
Calmar ratio: Return relative to maximum drawdown	2.40	2.82	-0.41
Martin ratio: Return relative to average drawdown	8.66	9.96	-1.30
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NBNGX vs. FSMAX - Sharpe Ratio Comparison

The current NBNGX Sharpe Ratio is 1.37, which is comparable to the FSMAX Sharpe Ratio of 1.69. The chart below compares the historical Sharpe Ratios of NBNGX 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.

Sharpe Ratios by Period

	NBNGX	FSMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.37	1.69	-0.31
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.57	0.29	+0.28
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.63	0.40	+0.23
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.46	-0.07

Drawdowns

NBNGX vs. FSMAX - Drawdown Comparison

The maximum NBNGX drawdown since its inception was -70.94%, which is greater than FSMAX's maximum drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for NBNGX and FSMAX.

Drawdown Indicators

	NBNGX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-70.94%	-50.55%	-20.39%
Max Drawdown (1Y) Largest decline over 1 year	-9.70%	-10.26%	+0.56%
Max Drawdown (3Y) Largest decline over 3 years	-24.71%	-26.82%	+2.11%
Max Drawdown (5Y) Largest decline over 5 years	-34.84%	-36.31%	+1.47%
Max Drawdown (10Y) Largest decline over 10 years	-35.14%	-50.55%	+15.41%
Current Drawdown Current decline from peak	-0.75%	-1.00%	+0.25%
Average Drawdown Average peak-to-trough decline	-21.14%	-12.16%	-8.98%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.69%	2.90%	-0.21%

Volatility

NBNGX vs. FSMAX - Volatility Comparison

SIT Mid Cap Growth Fund (NBNGX) and Fidelity Extended Market Index Fund (FSMAX) have volatilities of 4.90% and 4.84%, 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

	NBNGX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.90%	4.84%	+0.06%
Volatility (6M) Calculated over the trailing 6-month period	13.36%	12.48%	+0.88%
Volatility (1Y) Calculated over the trailing 1-year period	17.03%	17.20%	-0.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	29.99%	22.33%	+7.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.84%	30.23%	-4.39%

NBNGX vs. FSMAX - Expense Ratio Comparison

NBNGX has a 1.25% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

Dividends

NBNGX vs. FSMAX - Dividend Comparison

NBNGX's dividend yield for the trailing twelve months is around 2.99%, more than FSMAX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
NBNGX SIT Mid Cap Growth Fund	2.99%	3.39%	38.38%	0.47%	3.08%	12.28%	4.17%	7.51%	12.40%	4.24%	1.00%	18.44%

Frequently Asked Questions

Can I hold both NBNGX and FSMAX in my portfolio?

NBNGX and FSMAX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NBNGX or FSMAX?

NBNGX has higher volatility (4.90%) compared to FSMAX (4.84%). In terms of maximum drawdown, NBNGX dropped -70.94% vs FSMAX's -50.55%.

Which has better risk-adjusted returns?

FSMAX currently has the higher Sharpe Ratio (1.69 vs 1.37), 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.