EISMX vs. OANMX

Last updated Jun 23, 2026

EISMX (Eaton Vance Atlanta Capital SMID-Cap Fund) and OANMX (Oakmark Fund Institutional Class) are both mutual funds - EISMX is a Mid Cap Growth Equities fund managed by Eaton Vance, while OANMX is a Large Cap Value Equities fund managed by Oakmark. Over the past 5 years, EISMX returned 4.13%/yr vs 10.49%/yr for OANMX. Their correlation of 0.86 suggests significant overlap in exposure. EISMX charges 0.88%/yr vs 0.68%/yr for OANMX.

Performance

EISMX vs. OANMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Eaton Vance Atlanta Capital SMID-Cap Fund (EISMX) and Oakmark Fund Institutional Class (OANMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, EISMX achieves a -3.26% return, which is significantly lower than OANMX's -1.91% return.

EISMX

• 1D: 0.39%
• 1M: -0.06%
• YTD: -3.26%
• 6M: -4.91%
• 1Y: -4.50%
• 3Y*: 5.98%
• 5Y*: 4.13%
• 10Y*: 9.58%

OANMX

• 1D: -0.45%
• 1M: -1.02%
• YTD: -1.91%
• 6M: -2.54%
• 1Y: 9.22%
• 3Y*: 13.57%
• 5Y*: 10.49%
• 10Y*: —

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

EISMX vs. OANMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
EISMX Eaton Vance Atlanta Capital SMID-Cap Fund	-3.26%	-5.66%	17.64%	14.01%	-8.77%	22.02%	11.31%	34.37%	-5.55%	24.71%
OANMX Oakmark Fund Institutional Class	-1.91%	14.38%	16.28%	31.21%	-13.18%	34.87%	13.09%	27.35%	-12.62%	15.96%

Correlation

The correlation between EISMX and OANMX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.86

The correlation between EISMX and OANMX has been stable across timeframes, ranging from 0.83 to 0.86 - a consistent structural relationship.

Return for Risk

EISMX vs. OANMX — Risk / Return Rank

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

EISMX

EISMX Risk / Return Rank: 2
EISMX Sharpe Ratio Rank: 2
EISMX Sortino Ratio Rank: 2
EISMX Omega Ratio Rank: 2
EISMX Calmar Ratio Rank: 1
EISMX Martin Ratio Rank: 1

OANMX

OANMX Risk / Return Rank: 11
OANMX Sharpe Ratio Rank: 9
OANMX Sortino Ratio Rank: 9
OANMX Omega Ratio Rank: 9
OANMX Calmar Ratio Rank: 16
OANMX Martin Ratio Rank: 12

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.

EISMX vs. OANMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Eaton Vance Atlanta Capital SMID-Cap Fund (EISMX) and Oakmark Fund Institutional Class (OANMX). 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.

	EISMX	OANMX	Difference
Sharpe ratio: Return per unit of total volatility	-0.30	0.71	-1.00
Sortino ratio: Return per unit of downside risk	-0.33	1.10	-1.43
Omega ratio: Gain probability vs. loss probability	0.96	1.13	-0.17
Calmar ratio: Return relative to maximum drawdown	-0.31	1.34	-1.66
Martin ratio: Return relative to average drawdown	-0.59	3.33	-3.92

EISMX vs. OANMX - Sharpe Ratio Comparison

The current EISMX Sharpe Ratio is -0.30, which is lower than the OANMX Sharpe Ratio of 0.71. The chart below compares the historical Sharpe Ratios of EISMX and OANMX, 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

EISMX vs. OANMX - Drawdown Comparison

The maximum EISMX drawdown since its inception was -45.32%, which is greater than OANMX's maximum drawdown of -40.08%. Use the drawdown chart below to compare losses from any high point for EISMX and OANMX.

Drawdown Indicators

	EISMX	OANMX	Difference
Max Drawdown Largest peak-to-trough decline	-45.32%	-40.08%	-5.24%
Max Drawdown (1Y) Largest decline over 1 year	-14.66%	-6.93%	-7.73%
Max Drawdown (3Y) Largest decline over 3 years	-19.39%	-17.01%	-2.38%
Max Drawdown (5Y) Largest decline over 5 years	-19.81%	-23.55%	+3.74%
Max Drawdown (10Y) Largest decline over 10 years	-39.95%	—	—
Current Drawdown Current decline from peak	-14.00%	-4.43%	-9.57%
Average Drawdown Average peak-to-trough decline	-5.84%	-5.57%	-0.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.77%	2.79%	+4.98%

Volatility

EISMX vs. OANMX - Volatility Comparison

Eaton Vance Atlanta Capital SMID-Cap Fund (EISMX) has a higher volatility of 4.58% compared to Oakmark Fund Institutional Class (OANMX) at 3.89%. This indicates that EISMX's price experiences larger fluctuations and is considered to be riskier than OANMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	EISMX	OANMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.58%	3.89%	+0.69%
Volatility (6M) Calculated over the trailing 6-month period	11.48%	9.45%	+2.03%
Volatility (1Y) Calculated over the trailing 1-year period	15.54%	13.18%	+2.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.16%	18.30%	-1.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.88%	20.62%	-1.74%

EISMX vs. OANMX - Expense Ratio Comparison

EISMX has a 0.88% expense ratio, which is higher than OANMX's 0.68% expense ratio.

Dividends

EISMX vs. OANMX - Dividend Comparison

EISMX's dividend yield for the trailing twelve months is around 6.64%, more than OANMX's 1.16% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
EISMX Eaton Vance Atlanta Capital SMID-Cap Fund	6.64%	6.43%	7.26%	2.78%	10.37%	10.49%	9.80%	6.52%	7.20%	3.30%	3.58%	6.70%
OANMX Oakmark Fund Institutional Class	1.16%	1.14%	1.34%	1.22%	1.17%	1.94%	0.33%	8.53%	8.37%	0.66%	0.00%	0.00%

Frequently Asked Questions

Can I hold both EISMX and OANMX in my portfolio?

EISMX and OANMX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, EISMX or OANMX?

EISMX has higher volatility (4.58%) compared to OANMX (3.89%). In terms of maximum drawdown, EISMX dropped -45.32% vs OANMX's -40.08%.

Which has better risk-adjusted returns?

OANMX currently has the higher Sharpe Ratio (0.71 vs -0.30), 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.