ERASX vs. FSMDX

Last updated Jun 23, 2026

ERASX (Eaton Vance Atlanta Capital SMID-Cap Fund Class A) and FSMDX (Fidelity Mid Cap Index Fund) are both Mid Cap Blend Equities funds. ERASX is actively managed, while FSMDX is passively managed. Over the past 10 years, ERASX returned 10.43%/yr vs 11.79%/yr for FSMDX. Their correlation of 0.92 suggests significant overlap in exposure. ERASX charges 0.81%/yr vs 0.03%/yr for FSMDX.

Performance

ERASX vs. FSMDX - 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 Fidelity Mid Cap Index Fund (FSMDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ERASX achieves a -3.22% return, which is significantly lower than FSMDX's 13.43% return. Over the past 10 years, ERASX has underperformed FSMDX with an annualized return of 10.43%, while FSMDX has yielded a comparatively higher 11.79% annualized return.

ERASX

• 1D: 0.42%
• 1M: -0.03%
• YTD: -3.22%
• 6M: -4.88%
• 1Y: -4.42%
• 3Y*: 6.06%
• 5Y*: 4.21%
• 10Y*: 10.43%

FSMDX

• 1D: 0.99%
• 1M: 2.77%
• YTD: 13.43%
• 6M: 11.53%
• 1Y: 22.95%
• 3Y*: 16.47%
• 5Y*: 8.89%
• 10Y*: 11.79%

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

ERASX vs. FSMDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ERASX Eaton Vance Atlanta Capital SMID-Cap Fund Class A	-3.22%	-5.59%	17.74%	14.08%	-8.72%	22.10%	11.40%	44.21%	-5.47%	24.82%
FSMDX Fidelity Mid Cap Index Fund	13.43%	10.58%	15.55%	17.20%	-17.27%	22.56%	17.13%	30.53%	-9.38%	18.04%

Correlation

The correlation between ERASX and FSMDX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.91
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Jan 2, 2015	0.92

The correlation between ERASX and FSMDX shifts across timeframes, from 0.81 (1 year) to 0.92 (all time), reflecting how their relationship changes across market environments.

Return for Risk

ERASX vs. FSMDX — 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: 1
ERASX Martin Ratio Rank: 2

FSMDX

FSMDX Risk / Return Rank: 46
FSMDX Sharpe Ratio Rank: 38
FSMDX Sortino Ratio Rank: 39
FSMDX Omega Ratio Rank: 35
FSMDX Calmar Ratio Rank: 60
FSMDX Martin Ratio Rank: 57

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. FSMDX - 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 Fidelity Mid Cap Index Fund (FSMDX). 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	FSMDX	Difference
Sharpe ratio: Return per unit of total volatility	-0.29	1.68	-1.97
Sortino ratio: Return per unit of downside risk	-0.32	2.40	-2.72
Omega ratio: Gain probability vs. loss probability	0.96	1.29	-0.33
Calmar ratio: Return relative to maximum drawdown	-0.31	2.84	-3.15
Martin ratio: Return relative to average drawdown	-0.58	10.86	-11.44

ERASX vs. FSMDX - Sharpe Ratio Comparison

The current ERASX Sharpe Ratio is -0.29, which is lower than the FSMDX Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of ERASX and FSMDX, 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. FSMDX - Drawdown Comparison

The maximum ERASX drawdown since its inception was -39.94%, roughly equal to the maximum FSMDX drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for ERASX and FSMDX.

Drawdown Indicators

	ERASX	FSMDX	Difference
Max Drawdown Largest peak-to-trough decline	-39.94%	-40.35%	+0.41%
Max Drawdown (1Y) Largest decline over 1 year	-14.63%	-8.16%	-6.47%
Max Drawdown (3Y) Largest decline over 3 years	-19.36%	-20.92%	+1.56%
Max Drawdown (5Y) Largest decline over 5 years	-19.77%	-26.07%	+6.30%
Max Drawdown (10Y) Largest decline over 10 years	-39.94%	-40.35%	+0.41%
Current Drawdown Current decline from peak	-13.89%	-0.78%	-13.11%
Average Drawdown Average peak-to-trough decline	-5.09%	-4.94%	-0.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.75%	2.13%	+5.62%

Volatility

ERASX vs. FSMDX - Volatility Comparison

Eaton Vance Atlanta Capital SMID-Cap Fund Class A (ERASX) and Fidelity Mid Cap Index Fund (FSMDX) have volatilities of 4.59% and 4.57%, 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

	ERASX	FSMDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.59%	4.57%	+0.02%
Volatility (6M) Calculated over the trailing 6-month period	11.45%	10.47%	+0.98%
Volatility (1Y) Calculated over the trailing 1-year period	15.52%	13.82%	+1.70%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.10%	18.33%	-1.23%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.96%	19.35%	-0.39%

ERASX vs. FSMDX - Expense Ratio Comparison

ERASX has a 0.81% expense ratio, which is higher than FSMDX's 0.03% expense ratio.

Dividends

ERASX vs. FSMDX - Dividend Comparison

ERASX's dividend yield for the trailing twelve months is around 6.65%, more than FSMDX's 0.97% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ERASX Eaton Vance Atlanta Capital SMID-Cap Fund Class A	6.65%	6.44%	7.29%	2.82%	10.26%	10.40%	9.73%	13.15%	7.16%	3.29%	3.57%	6.68%
FSMDX Fidelity Mid Cap Index Fund	0.97%	1.10%	2.46%	1.39%	2.07%	3.35%	2.34%	2.86%	2.21%	2.17%	2.23%	2.84%

Frequently Asked Questions

Can I hold both ERASX and FSMDX in my portfolio?

ERASX and FSMDX have a correlation of 0.81, 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 FSMDX?

ERASX has higher volatility (4.59%) compared to FSMDX (4.57%). In terms of maximum drawdown, ERASX dropped -39.94% vs FSMDX's -40.35%.

Which has better risk-adjusted returns?

FSMDX currently has the higher Sharpe Ratio (1.68 vs -0.29), 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.