BSBAX vs. NSIDX

Last updated Jun 6, 2026

BSBAX (Northern Short Bond Fund) and NSIDX (Northern Small Cap Index Fund) are both mutual funds - BSBAX is a Short-Term Bond fund managed by Northern Funds, while NSIDX is a Small Cap Blend Equities fund managed by Northern Funds. Over the past 10 years, BSBAX returned 1.95%/yr vs 10.87%/yr for NSIDX. At a correlation of -0.10, they often move in opposite directions. BSBAX charges 0.40%/yr vs 0.10%/yr for NSIDX.

Performance

BSBAX vs. NSIDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Northern Short Bond Fund (BSBAX) and Northern Small Cap Index Fund (NSIDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BSBAX achieves a 0.57% return, which is significantly lower than NSIDX's 18.81% return. Over the past 10 years, BSBAX has underperformed NSIDX with an annualized return of 1.95%, while NSIDX has yielded a comparatively higher 10.87% annualized return.

BSBAX

• 1D: 0.05%
• 1M: 0.17%
• YTD: 0.57%
• 6M: 1.02%
• 1Y: 3.92%
• 3Y*: 4.02%
• 5Y*: 1.54%
• 10Y*: 1.95%

NSIDX

• 1D: 1.43%
• 1M: 1.77%
• YTD: 18.81%
• 6M: 17.12%
• 1Y: 41.75%
• 3Y*: 19.18%
• 5Y*: 6.43%
• 10Y*: 10.87%

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

BSBAX vs. NSIDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BSBAX Northern Short Bond Fund	0.57%	4.46%	4.07%	4.52%	-4.89%	-0.44%	3.73%	5.19%	0.73%	1.59%
NSIDX Northern Small Cap Index Fund	18.81%	12.88%	11.45%	16.87%	-20.63%	14.38%	19.59%	25.22%	-11.33%	14.62%

Correlation

The correlation between BSBAX and NSIDX is 0.28, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.28
Correlation (3Y) Calculated over the trailing 3-year period	0.16
Correlation (5Y) Calculated over the trailing 5-year period	0.18
Correlation (10Y) Calculated over the trailing 10-year period	0.08
Correlation (All Time) Calculated using the full available price history since Sep 7, 1999	-0.10

The correlation between BSBAX and NSIDX shifts across timeframes, from -0.10 (all time) to 0.28 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

BSBAX vs. NSIDX — Risk / Return Rank

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

BSBAX

BSBAX Risk / Return Rank: 77
BSBAX Sharpe Ratio Rank: 67
BSBAX Sortino Ratio Rank: 94
BSBAX Omega Ratio Rank: 88
BSBAX Calmar Ratio Rank: 75
BSBAX Martin Ratio Rank: 58

NSIDX

NSIDX Risk / Return Rank: 64
NSIDX Sharpe Ratio Rank: 56
NSIDX Sortino Ratio Rank: 55
NSIDX Omega Ratio Rank: 48
NSIDX Calmar Ratio Rank: 85
NSIDX Martin Ratio Rank: 75

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.

BSBAX vs. NSIDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Northern Short Bond Fund (BSBAX) and Northern Small Cap Index Fund (NSIDX). 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.

	BSBAX	NSIDX	Difference
Sharpe ratio: Return per unit of total volatility	2.33	2.15	+0.18
Sortino ratio: Return per unit of downside risk	4.81	3.03	+1.78
Omega ratio: Gain probability vs. loss probability	1.62	1.36	+0.25
Calmar ratio: Return relative to maximum drawdown	3.30	3.88	-0.58
Martin ratio: Return relative to average drawdown	11.20	13.67	-2.47
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BSBAX vs. NSIDX - Sharpe Ratio Comparison

The current BSBAX Sharpe Ratio is 2.33, which is comparable to the NSIDX Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of BSBAX and NSIDX, 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

	BSBAX	NSIDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.33	2.15	+0.18
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.73	0.27	+0.47
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.09	0.45	+0.64
Sharpe Ratio (All Time) Calculated using the full available price history	1.68	0.34	+1.34

Drawdowns

BSBAX vs. NSIDX - Drawdown Comparison

The maximum BSBAX drawdown since its inception was -7.31%, smaller than the maximum NSIDX drawdown of -59.02%. Use the drawdown chart below to compare losses from any high point for BSBAX and NSIDX.

Drawdown Indicators

	BSBAX	NSIDX	Difference
Max Drawdown Largest peak-to-trough decline	-7.31%	-59.02%	+51.71%
Max Drawdown (1Y) Largest decline over 1 year	-1.19%	-10.97%	+9.78%
Max Drawdown (3Y) Largest decline over 3 years	-1.20%	-27.71%	+26.51%
Max Drawdown (5Y) Largest decline over 5 years	-7.31%	-32.89%	+25.58%
Max Drawdown (10Y) Largest decline over 10 years	-7.31%	-42.09%	+34.78%
Current Drawdown Current decline from peak	-0.30%	0.00%	-0.30%
Average Drawdown Average peak-to-trough decline	-0.62%	-12.06%	+11.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.35%	3.09%	-2.74%

Volatility

BSBAX vs. NSIDX - Volatility Comparison

The current volatility for Northern Short Bond Fund (BSBAX) is 0.63%, while Northern Small Cap Index Fund (NSIDX) has a volatility of 5.69%. This indicates that BSBAX experiences smaller price fluctuations and is considered to be less risky than NSIDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BSBAX	NSIDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.63%	5.69%	-5.06%
Volatility (6M) Calculated over the trailing 6-month period	1.20%	13.78%	-12.58%
Volatility (1Y) Calculated over the trailing 1-year period	1.69%	19.81%	-18.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.12%	24.24%	-22.12%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.79%	24.26%	-22.47%

BSBAX vs. NSIDX - Expense Ratio Comparison

BSBAX has a 0.40% expense ratio, which is higher than NSIDX's 0.10% expense ratio.

Dividends

BSBAX vs. NSIDX - Dividend Comparison

BSBAX's dividend yield for the trailing twelve months is around 4.08%, more than NSIDX's 1.32% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BSBAX Northern Short Bond Fund	4.08%	3.20%	3.54%	2.49%	0.94%	1.20%	2.00%	2.62%	2.57%	1.85%	1.43%	1.25%
NSIDX Northern Small Cap Index Fund	1.32%	1.57%	6.72%	2.01%	6.38%	12.15%	3.52%	1.78%	12.16%	6.55%	4.06%	6.68%

Frequently Asked Questions

Can I hold both BSBAX and NSIDX in my portfolio?

BSBAX and NSIDX have a correlation of 0.28, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BSBAX or NSIDX?

NSIDX has higher volatility (5.69%) compared to BSBAX (0.63%). In terms of maximum drawdown, BSBAX dropped -7.31% vs NSIDX's -59.02%.

Which has better risk-adjusted returns?

BSBAX currently has the higher Sharpe Ratio (2.33 vs 2.15), 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.