ERASX vs. TARKX

Last updated Jul 15, 2026

ERASX (Eaton Vance Atlanta Capital SMID-Cap Fund Class A) and TARKX (Tarkio Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, ERASX returned 10.75%/yr vs 14.43%/yr for TARKX. A 0.80 correlation means they provide meaningful diversification when combined. ERASX charges 0.81%/yr vs 1.00%/yr for TARKX.

Performance

ERASX vs. TARKX - Performance Comparison

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

Returns By Period

In the year-to-date period, ERASX achieves a 1.69% return, which is significantly lower than TARKX's 19.13% return. Over the past 10 years, ERASX has underperformed TARKX with an annualized return of 10.75%, while TARKX has yielded a comparatively higher 14.43% annualized return.

ERASX

• 1D: 0.37%
• 1M: 3.58%
• 6M: -2.69%
• YTD: 1.69%
• 1Y: -4.56%
• 3Y*: 6.45%
• 5Y*: 4.72%
• 10Y*: 10.75%

TARKX

• 1D: -1.99%
• 1M: -0.33%
• 6M: 12.78%
• YTD: 19.13%
• 1Y: 43.42%
• 3Y*: 24.14%
• 5Y*: 11.37%
• 10Y*: 14.43%

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

ERASX vs. TARKX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ERASX Eaton Vance Atlanta Capital SMID-Cap Fund Class A	1.69%	-5.59%	17.74%	14.08%	-8.72%	22.10%	11.40%	44.21%	-5.47%	24.82%
TARKX Tarkio Fund	19.13%	30.18%	21.72%	26.33%	-30.39%	24.41%	27.00%	29.54%	-23.30%	29.04%

Correlation

The correlation between ERASX and TARKX is 0.44, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.44
Correlation (3Y) Calculated over the trailing 3-year period	0.65
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Jan 2, 2015	0.80

Over the past year, the correlation between ERASX and TARKX has dropped to 0.44 - well below their long-term average of 0.80, suggesting their price drivers have been diverging.

Return for Risk

ERASX vs. TARKX — Risk / Return Rank

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

ERASX

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

TARKX

TARKX Risk / Return Rank: 53
TARKX Sharpe Ratio Rank: 47
TARKX Sortino Ratio Rank: 45
TARKX Omega Ratio Rank: 41
TARKX Calmar Ratio Rank: 72
TARKX Martin Ratio Rank: 61

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.

ERASX vs. TARKX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Eaton Vance Atlanta Capital SMID-Cap Fund Class A (ERASX) and Tarkio Fund (TARKX). 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.

	ERASX	TARKX	Difference
Sharpe ratio: Return per unit of total volatility	-0.28	1.52	-1.80
Sortino ratio: Return per unit of downside risk	-0.30	2.13	-2.43
Omega ratio: Gain probability vs. loss probability	0.97	1.26	-0.29
Calmar ratio: Return relative to maximum drawdown	-0.30	2.60	-2.90
Martin ratio: Return relative to average drawdown	-0.54	9.28	-9.82

ERASX vs. TARKX - Sharpe Ratio Comparison

The current ERASX Sharpe Ratio is -0.28, which is lower than the TARKX Sharpe Ratio of 1.52. The chart below compares the historical Sharpe Ratios of ERASX and TARKX, 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

ERASX vs. TARKX - Drawdown Comparison

The maximum ERASX drawdown since its inception was -39.94%, roughly equal to the maximum TARKX drawdown of -40.55%. Use the drawdown chart below to compare losses from any high point for ERASX and TARKX.

Drawdown Indicators

	ERASX	TARKX	Difference
Max Drawdown Largest peak-to-trough decline	-39.94%	-40.55%	+0.61%
Max Drawdown (1Y) Largest decline over 1 year	-14.63%	-16.99%	+2.36%
Max Drawdown (3Y) Largest decline over 3 years	-19.36%	-36.99%	+17.63%
Max Drawdown (5Y) Largest decline over 5 years	-19.77%	-40.38%	+20.61%
Max Drawdown (10Y) Largest decline over 10 years	-39.94%	-40.55%	+0.61%
Current Drawdown Current decline from peak	-9.53%	-6.54%	-2.99%
Average Drawdown Average peak-to-trough decline	-5.12%	-10.32%	+5.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.00%	4.75%	+3.25%

Volatility

ERASX vs. TARKX - Volatility Comparison

The current volatility for Eaton Vance Atlanta Capital SMID-Cap Fund Class A (ERASX) is 4.37%, while Tarkio Fund (TARKX) has a volatility of 9.49%. This indicates that ERASX experiences smaller price fluctuations and is considered to be less risky than TARKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ERASX	TARKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.37%	9.49%	-5.12%
Volatility (6M) Calculated over the trailing 6-month period	11.58%	22.47%	-10.89%
Volatility (1Y) Calculated over the trailing 1-year period	15.70%	29.05%	-13.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.09%	27.82%	-10.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.89%	26.77%	-7.88%

ERASX vs. TARKX - Expense Ratio Comparison

ERASX has a 0.81% expense ratio, which is lower than TARKX's 1.00% expense ratio.

Dividends

ERASX vs. TARKX - Dividend Comparison

ERASX's dividend yield for the trailing twelve months is around 6.33%, more than TARKX's 4.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ERASX Eaton Vance Atlanta Capital SMID-Cap Fund Class A	6.33%	6.44%	7.29%	2.82%	10.26%	10.40%	9.73%	13.15%	7.16%	3.29%	3.57%	6.68%
TARKX Tarkio Fund	4.62%	5.50%	1.51%	2.98%	10.62%	1.40%	0.50%	5.21%	3.34%	1.70%	0.47%	0.36%

Frequently Asked Questions

Can I hold both ERASX and TARKX in my portfolio?

ERASX and TARKX have a correlation of 0.44, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ERASX or TARKX?

TARKX has higher volatility (9.49%) compared to ERASX (4.37%). In terms of maximum drawdown, ERASX dropped -39.94% vs TARKX's -40.55%.

Which has better risk-adjusted returns?

TARKX currently has the higher Sharpe Ratio (1.52 vs -0.28), 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.