GRMRX vs. GMXAX

Last updated Jun 23, 2026

GRMRX (Nationwide S&P 500 Index Fund Class R) and GMXAX (Nationwide Mid Cap Market Index Fund) are both mutual funds - GRMRX is a S&P 500 fund tracking the S&P 500 Index, while GMXAX is a Mid Cap Blend Equities fund managed by Nationwide. Over the past 10 years, GRMRX returned 14.67%/yr vs 9.57%/yr for GMXAX. Their correlation of 0.89 suggests significant overlap in exposure. GRMRX charges 0.93%/yr vs 0.68%/yr for GMXAX.

Performance

GRMRX vs. GMXAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nationwide S&P 500 Index Fund Class R (GRMRX) and Nationwide Mid Cap Market Index Fund (GMXAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, GRMRX achieves a 9.75% return, which is significantly lower than GMXAX's 15.14% return. Over the past 10 years, GRMRX has outperformed GMXAX with an annualized return of 14.67%, while GMXAX has yielded a comparatively lower 9.57% annualized return.

GRMRX

• 1D: 1.10%
• 1M: 0.42%
• YTD: 9.75%
• 6M: 9.25%
• 1Y: 26.14%
• 3Y*: 19.78%
• 5Y*: 13.02%
• 10Y*: 14.67%

GMXAX

• 1D: 1.17%
• 1M: 3.35%
• YTD: 15.14%
• 6M: 12.67%
• 1Y: 26.42%
• 3Y*: 14.43%
• 5Y*: 8.67%
• 10Y*: 9.57%

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

GRMRX vs. GMXAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GRMRX Nationwide S&P 500 Index Fund Class R	9.75%	16.90%	23.49%	25.00%	-18.86%	27.62%	17.38%	30.41%	-4.21%	20.78%
GMXAX Nationwide Mid Cap Market Index Fund	15.14%	6.84%	12.15%	15.89%	-13.45%	24.33%	12.79%	25.35%	-10.65%	2.80%

Correlation

The correlation between GRMRX and GMXAX is 0.76, 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	0.76
Correlation (3Y) Calculated over the trailing 3-year period	0.79
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 Jan 2, 2008	0.89

The correlation between GRMRX and GMXAX shifts across timeframes, from 0.76 (1 year) to 0.89 (all time), reflecting how their relationship changes across market environments.

Return for Risk

GRMRX vs. GMXAX — Risk / Return Rank

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

GRMRX

GRMRX Risk / Return Rank: 61
GRMRX Sharpe Ratio Rank: 59
GRMRX Sortino Ratio Rank: 53
GRMRX Omega Ratio Rank: 56
GRMRX Calmar Ratio Rank: 62
GRMRX Martin Ratio Rank: 73

GMXAX

GMXAX Risk / Return Rank: 48
GMXAX Sharpe Ratio Rank: 39
GMXAX Sortino Ratio Rank: 40
GMXAX Omega Ratio Rank: 36
GMXAX Calmar Ratio Rank: 67
GMXAX Martin Ratio Rank: 58

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.

GRMRX vs. GMXAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nationwide S&P 500 Index Fund Class R (GRMRX) and Nationwide Mid Cap Market Index Fund (GMXAX). 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.

	GRMRX	GMXAX	Difference
Sharpe ratio: Return per unit of total volatility	2.08	1.69	+0.39
Sortino ratio: Return per unit of downside risk	2.82	2.46	+0.36
Omega ratio: Gain probability vs. loss probability	1.38	1.30	+0.08
Calmar ratio: Return relative to maximum drawdown	2.88	3.02	-0.13
Martin ratio: Return relative to average drawdown	12.93	10.92	+2.01

GRMRX vs. GMXAX - Sharpe Ratio Comparison

The current GRMRX Sharpe Ratio is 2.08, which is comparable to the GMXAX Sharpe Ratio of 1.69. The chart below compares the historical Sharpe Ratios of GRMRX and GMXAX, 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

GRMRX vs. GMXAX - Drawdown Comparison

The maximum GRMRX drawdown since its inception was -52.25%, smaller than the maximum GMXAX drawdown of -55.64%. Use the drawdown chart below to compare losses from any high point for GRMRX and GMXAX.

Drawdown Indicators

	GRMRX	GMXAX	Difference
Max Drawdown Largest peak-to-trough decline	-52.25%	-55.64%	+3.39%
Max Drawdown (1Y) Largest decline over 1 year	-9.01%	-8.83%	-0.18%
Max Drawdown (3Y) Largest decline over 3 years	-18.84%	-24.21%	+5.37%
Max Drawdown (5Y) Largest decline over 5 years	-25.04%	-24.21%	-0.83%
Max Drawdown (10Y) Largest decline over 10 years	-33.87%	-42.22%	+8.35%
Current Drawdown Current decline from peak	-1.40%	-0.41%	-0.99%
Average Drawdown Average peak-to-trough decline	-6.99%	-8.05%	+1.06%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.01%	2.43%	-0.42%

Volatility

GRMRX vs. GMXAX - Volatility Comparison

Nationwide S&P 500 Index Fund Class R (GRMRX) and Nationwide Mid Cap Market Index Fund (GMXAX) have volatilities of 4.77% and 4.91%, 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

	GRMRX	GMXAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.77%	4.91%	-0.14%
Volatility (6M) Calculated over the trailing 6-month period	9.90%	11.68%	-1.78%
Volatility (1Y) Calculated over the trailing 1-year period	12.47%	15.74%	-3.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.04%	19.73%	-2.69%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.12%	21.33%	-3.21%

GRMRX vs. GMXAX - Expense Ratio Comparison

GRMRX has a 0.93% expense ratio, which is higher than GMXAX's 0.68% expense ratio.

Dividends

GRMRX vs. GMXAX - Dividend Comparison

GRMRX's dividend yield for the trailing twelve months is around 4.31%, less than GMXAX's 11.26% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GMXAX Nationwide Mid Cap Market Index Fund	11.26%	12.93%	11.73%	6.17%	9.58%	12.52%	3.18%	5.18%	23.21%	0.85%	9.60%	13.94%
GRMRX Nationwide S&P 500 Index Fund Class R	4.31%	4.74%	2.21%	0.47%	1.20%	4.63%	0.86%	5.98%	18.24%	6.42%	7.16%	11.57%

Frequently Asked Questions

Can I hold both GRMRX and GMXAX in my portfolio?

GRMRX and GMXAX have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, GRMRX or GMXAX?

GMXAX has higher volatility (4.91%) compared to GRMRX (4.77%). In terms of maximum drawdown, GRMRX dropped -52.25% vs GMXAX's -55.64%.

Which has better risk-adjusted returns?

GRMRX currently has the higher Sharpe Ratio (2.08 vs 1.69), 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.