NOMIX vs. GTSGX

Last updated Jun 4, 2026

NOMIX (Northern Mid Cap Index Fund) and GTSGX (Madison Mid Cap Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, NOMIX returned 11.12%/yr vs 10.41%/yr for GTSGX. Their correlation of 0.90 suggests significant overlap in exposure. NOMIX charges 0.10%/yr vs 0.95%/yr for GTSGX.

Performance

NOMIX vs. GTSGX - Performance Comparison

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

Returns By Period

In the year-to-date period, NOMIX achieves a 14.18% return, which is significantly higher than GTSGX's -1.68% return. Over the past 10 years, NOMIX has outperformed GTSGX with an annualized return of 11.12%, while GTSGX has yielded a comparatively lower 10.41% annualized return.

NOMIX

• 1D: 0.89%
• 1M: 3.94%
• YTD: 14.18%
• 6M: 14.46%
• 1Y: 25.61%
• 3Y*: 16.01%
• 5Y*: 8.10%
• 10Y*: 11.12%

GTSGX

• 1D: -0.38%
• 1M: 1.74%
• YTD: -1.68%
• 6M: -1.41%
• 1Y: -0.33%
• 3Y*: 9.74%
• 5Y*: 6.54%
• 10Y*: 10.41%

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

NOMIX vs. GTSGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NOMIX Northern Mid Cap Index Fund	14.18%	7.45%	13.41%	16.43%	-13.42%	24.47%	13.59%	25.94%	-11.31%	16.06%
GTSGX Madison Mid Cap Fund	-1.68%	1.62%	10.24%	26.51%	-13.60%	26.31%	9.45%	33.53%	-1.60%	15.65%

Correlation

The correlation between NOMIX and GTSGX is 0.71, 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	0.71
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Mar 24, 2005	0.90

The correlation between NOMIX and GTSGX shifts across timeframes, from 0.71 (1 year) to 0.90 (all time), reflecting how their relationship changes across market environments.

Return for Risk

NOMIX vs. GTSGX — Risk / Return Rank

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

NOMIX

NOMIX Risk / Return Rank: 45
NOMIX Sharpe Ratio Rank: 34
NOMIX Sortino Ratio Rank: 34
NOMIX Omega Ratio Rank: 35
NOMIX Calmar Ratio Rank: 66
NOMIX Martin Ratio Rank: 57

GTSGX

GTSGX Risk / Return Rank: 3
GTSGX Sharpe Ratio Rank: 3
GTSGX Sortino Ratio Rank: 3
GTSGX Omega Ratio Rank: 3
GTSGX Calmar Ratio Rank: 3
GTSGX Martin Ratio Rank: 3

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. GTSGX - Risk-Adjusted Trends Comparison

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

	NOMIX	GTSGX	Difference
Sharpe ratio: Return per unit of total volatility	1.67	0.06	+1.61
Sortino ratio: Return per unit of downside risk	2.43	0.20	+2.23
Omega ratio: Gain probability vs. loss probability	1.31	1.02	+0.29
Calmar ratio: Return relative to maximum drawdown	3.14	0.08	+3.06
Martin ratio: Return relative to average drawdown	11.45	0.19	+11.27
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NOMIX vs. GTSGX - Sharpe Ratio Comparison

The current NOMIX Sharpe Ratio is 1.67, which is higher than the GTSGX Sharpe Ratio of 0.06. The chart below compares the historical Sharpe Ratios of NOMIX and GTSGX, 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

	NOMIX	GTSGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.67	0.06	+1.61
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.38	0.38	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.51	0.58	-0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.15	+0.30

Drawdowns

NOMIX vs. GTSGX - Drawdown Comparison

The maximum NOMIX drawdown since its inception was -55.44%, smaller than the maximum GTSGX drawdown of -73.82%. Use the drawdown chart below to compare losses from any high point for NOMIX and GTSGX.

Drawdown Indicators

	NOMIX	GTSGX	Difference
Max Drawdown Largest peak-to-trough decline	-55.44%	-73.82%	+18.38%
Max Drawdown (1Y) Largest decline over 1 year	-8.84%	-11.99%	+3.15%
Max Drawdown (3Y) Largest decline over 3 years	-24.34%	-19.63%	-4.71%
Max Drawdown (5Y) Largest decline over 5 years	-27.65%	-21.94%	-5.71%
Max Drawdown (10Y) Largest decline over 10 years	-42.03%	-38.25%	-3.78%
Current Drawdown Current decline from peak	0.00%	-7.49%	+7.49%
Average Drawdown Average peak-to-trough decline	-7.92%	-29.69%	+21.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.40%	4.83%	-2.43%

Volatility

NOMIX vs. GTSGX - Volatility Comparison

Northern Mid Cap Index Fund (NOMIX) has a higher volatility of 4.46% compared to Madison Mid Cap Fund (GTSGX) at 4.05%. This indicates that NOMIX's price experiences larger fluctuations and is considered to be riskier than GTSGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NOMIX	GTSGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.46%	4.05%	+0.41%
Volatility (6M) Calculated over the trailing 6-month period	12.51%	10.12%	+2.39%
Volatility (1Y) Calculated over the trailing 1-year period	16.58%	14.70%	+1.88%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.29%	17.43%	+3.86%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.81%	18.07%	+3.74%

NOMIX vs. GTSGX - Expense Ratio Comparison

NOMIX has a 0.10% expense ratio, which is lower than GTSGX's 0.95% expense ratio.

Dividends

NOMIX vs. GTSGX - Dividend Comparison

NOMIX's dividend yield for the trailing twelve months is around 6.07%, more than GTSGX's 3.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GTSGX Madison Mid Cap Fund	3.43%	3.37%	5.76%	1.25%	1.96%	4.38%	3.43%	3.74%	7.57%	3.58%	4.34%	6.09%
NOMIX Northern Mid Cap Index Fund	6.07%	6.93%	9.67%	8.01%	10.43%	10.30%	4.80%	2.21%	9.23%	7.46%	6.46%	8.25%

Frequently Asked Questions

Can I hold both NOMIX and GTSGX in my portfolio?

NOMIX and GTSGX have a correlation of 0.71, 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 GTSGX?

NOMIX has higher volatility (4.46%) compared to GTSGX (4.05%). In terms of maximum drawdown, NOMIX dropped -55.44% vs GTSGX's -73.82%.

Which has better risk-adjusted returns?

NOMIX currently has the higher Sharpe Ratio (1.67 vs 0.06), 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.