NOMIX vs. NOSIX

Last updated Jun 23, 2026

NOMIX (Northern Mid Cap Index Fund) and NOSIX (Northern Stock Index Fund) are both mutual funds - NOMIX is a Mid Cap Blend Equities fund managed by Northern Funds, while NOSIX is a Large Cap Blend Equities fund managed by Northern Funds. Over the past 10 years, NOMIX returned 11.27%/yr vs 15.48%/yr for NOSIX. Their correlation of 0.89 suggests significant overlap in exposure. NOMIX charges 0.10%/yr vs 0.05%/yr for NOSIX.

Performance

NOMIX vs. NOSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Northern Mid Cap Index Fund (NOMIX) and Northern Stock Index Fund (NOSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NOMIX achieves a 15.38% return, which is significantly higher than NOSIX's 10.17% return. Over the past 10 years, NOMIX has underperformed NOSIX with an annualized return of 11.27%, while NOSIX has yielded a comparatively higher 15.48% annualized return.

NOMIX

• 1D: 1.14%
• 1M: 3.31%
• YTD: 15.38%
• 6M: 12.94%
• 1Y: 27.12%
• 3Y*: 15.24%
• 5Y*: 9.16%
• 10Y*: 11.27%

NOSIX

• 1D: 1.08%
• 1M: 0.47%
• YTD: 10.17%
• 6M: 9.68%
• 1Y: 26.89%
• 3Y*: 20.93%
• 5Y*: 14.01%
• 10Y*: 15.48%

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

NOMIX vs. NOSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NOMIX Northern Mid Cap Index Fund	15.38%	7.45%	13.41%	16.43%	-13.42%	24.47%	13.59%	25.94%	-11.31%	16.06%
NOSIX Northern Stock Index Fund	10.17%	17.83%	24.87%	26.24%	-18.25%	28.55%	18.33%	31.35%	-4.54%	21.71%

Correlation

The correlation between NOMIX and NOSIX is 0.73, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since Mar 23, 2005	0.89

The correlation between NOMIX and NOSIX shifts across timeframes, from 0.73 (1 year) to 0.89 (all time), reflecting how their relationship changes across market environments.

Return for Risk

NOMIX vs. NOSIX — Risk / Return Rank

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

NOMIX

NOMIX Risk / Return Rank: 49
NOMIX Sharpe Ratio Rank: 37
NOMIX Sortino Ratio Rank: 38
NOMIX Omega Ratio Rank: 37
NOMIX Calmar Ratio Rank: 72
NOMIX Martin Ratio Rank: 62

NOSIX

NOSIX Risk / Return Rank: 67
NOSIX Sharpe Ratio Rank: 65
NOSIX Sortino Ratio Rank: 60
NOSIX Omega Ratio Rank: 63
NOSIX Calmar Ratio Rank: 69
NOSIX 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.

NOMIX vs. NOSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Northern Mid Cap Index Fund (NOMIX) and Northern Stock Index Fund (NOSIX). 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.

	NOMIX	NOSIX	Difference
Sharpe ratio: Return per unit of total volatility	1.64	2.17	-0.53
Sortino ratio: Return per unit of downside risk	2.39	2.96	-0.57
Omega ratio: Gain probability vs. loss probability	1.30	1.40	-0.10
Calmar ratio: Return relative to maximum drawdown	3.14	3.07	+0.07
Martin ratio: Return relative to average drawdown	11.43	13.88	-2.45

NOMIX vs. NOSIX - Sharpe Ratio Comparison

The current NOMIX Sharpe Ratio is 1.64, which is comparable to the NOSIX Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of NOMIX and NOSIX, 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

NOMIX vs. NOSIX - Drawdown Comparison

The maximum NOMIX drawdown since its inception was -55.44%, roughly equal to the maximum NOSIX drawdown of -55.42%. Use the drawdown chart below to compare losses from any high point for NOMIX and NOSIX.

Drawdown Indicators

	NOMIX	NOSIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.44%	-55.42%	-0.02%
Max Drawdown (1Y) Largest decline over 1 year	-8.84%	-8.89%	+0.05%
Max Drawdown (3Y) Largest decline over 3 years	-24.34%	-18.75%	-5.59%
Max Drawdown (5Y) Largest decline over 5 years	-27.65%	-24.54%	-3.11%
Max Drawdown (10Y) Largest decline over 10 years	-42.03%	-33.82%	-8.21%
Current Drawdown Current decline from peak	-0.41%	-1.34%	+0.93%
Average Drawdown Average peak-to-trough decline	-7.90%	-10.32%	+2.42%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.41%	1.95%	+0.46%

Volatility

NOMIX vs. NOSIX - Volatility Comparison

Northern Mid Cap Index Fund (NOMIX) and Northern Stock Index Fund (NOSIX) have volatilities of 4.87% and 4.75%, 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

	NOMIX	NOSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.87%	4.75%	+0.12%
Volatility (6M) Calculated over the trailing 6-month period	12.86%	9.90%	+2.96%
Volatility (1Y) Calculated over the trailing 1-year period	16.88%	12.56%	+4.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.33%	17.29%	+4.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.83%	18.25%	+3.58%

NOMIX vs. NOSIX - Expense Ratio Comparison

NOMIX has a 0.10% expense ratio, which is higher than NOSIX's 0.05% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

NOMIX vs. NOSIX - Dividend Comparison

NOMIX's dividend yield for the trailing twelve months is around 6.01%, more than NOSIX's 2.67% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NOMIX Northern Mid Cap Index Fund	6.01%	6.93%	9.67%	8.01%	10.43%	10.30%	4.80%	2.21%	9.23%	7.46%	6.46%	8.25%
NOSIX Northern Stock Index Fund	2.67%	2.94%	2.59%	5.02%	4.72%	3.22%	4.00%	2.41%	4.82%	3.13%	2.76%	3.36%

Frequently Asked Questions

Can I hold both NOMIX and NOSIX in my portfolio?

NOMIX and NOSIX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NOMIX or NOSIX?

NOMIX has higher volatility (4.87%) compared to NOSIX (4.75%). In terms of maximum drawdown, NOMIX dropped -55.44% vs NOSIX's -55.42%.

Which has better risk-adjusted returns?

NOSIX currently has the higher Sharpe Ratio (2.17 vs 1.64), 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.