FESM vs. FSMDX

Last updated Jun 24, 2026

FESM (Fidelity Enhanced Small Cap ETF) and FSMDX (Fidelity Mid Cap Index Fund) are both funds - FESM is a Small Cap Blend Equities fund actively managed by Fidelity, while FSMDX is a Mid Cap Blend Equities fund tracking the Russell Midcap Index. FESM is actively managed, while FSMDX is passively managed. Over the past year, FESM returned 51.65% vs 22.60% for FSMDX. Their correlation of 0.91 suggests significant overlap in exposure. FESM charges 0.28%/yr vs 0.03%/yr for FSMDX.

Performance

FESM vs. FSMDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Enhanced Small Cap ETF (FESM) 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, FESM achieves a 24.59% return, which is significantly higher than FSMDX's 14.03% return.

FESM

• 1D: -0.78%
• 1M: 4.79%
• YTD: 24.59%
• 6M: 22.07%
• 1Y: 51.65%
• 3Y*: —
• 5Y*: —
• 10Y*: —

FSMDX

• 1D: 0.53%
• 1M: 3.31%
• YTD: 14.03%
• 6M: 12.50%
• 1Y: 22.60%
• 3Y*: 17.64%
• 5Y*: 8.51%
• 10Y*: 12.12%

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

FESM vs. FSMDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
FESM Fidelity Enhanced Small Cap ETF	24.59%	17.88%	16.22%	12.09%
FSMDX Fidelity Mid Cap Index Fund	14.03%	10.58%	15.55%	9.95%

Correlation

The correlation between FESM and FSMDX is 0.90, 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	0.90
Correlation (All Time) Calculated using the full available price history since Nov 20, 2023	0.91

The correlation between FESM and FSMDX has been stable across timeframes, ranging from 0.90 to 0.91 - a consistent structural relationship.

Return for Risk

FESM vs. FSMDX — Risk / Return Rank

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

FESM

FESM Risk / Return Rank: 85
FESM Sharpe Ratio Rank: 86
FESM Sortino Ratio Rank: 84
FESM Omega Ratio Rank: 77
FESM Calmar Ratio Rank: 89
FESM Martin Ratio Rank: 88

FSMDX

FSMDX Risk / Return Rank: 48
FSMDX Sharpe Ratio Rank: 41
FSMDX Sortino Ratio Rank: 40
FSMDX Omega Ratio Rank: 36
FSMDX Calmar Ratio Rank: 63
FSMDX Martin Ratio Rank: 59

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.

FESM vs. FSMDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Enhanced Small Cap ETF (FESM) 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.

	FESM	FSMDX	Difference
Sharpe ratio: Return per unit of total volatility	2.66	1.72	+0.94
Sortino ratio: Return per unit of downside risk	3.53	2.45	+1.08
Omega ratio: Gain probability vs. loss probability	1.43	1.30	+0.13
Calmar ratio: Return relative to maximum drawdown	5.10	2.90	+2.19
Martin ratio: Return relative to average drawdown	18.36	11.11	+7.25

FESM vs. FSMDX - Sharpe Ratio Comparison

The current FESM Sharpe Ratio is 2.66, which is higher than the FSMDX Sharpe Ratio of 1.72. The chart below compares the historical Sharpe Ratios of FESM 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

FESM vs. FSMDX - Drawdown Comparison

The maximum FESM drawdown since its inception was -26.93%, smaller than the maximum FSMDX drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for FESM and FSMDX.

Drawdown Indicators

	FESM	FSMDX	Difference
Max Drawdown Largest peak-to-trough decline	-26.93%	-40.35%	+13.42%
Max Drawdown (1Y) Largest decline over 1 year	-10.18%	-8.16%	-2.02%
Max Drawdown (3Y) Largest decline over 3 years	—	-20.92%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-26.07%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-40.35%	—
Current Drawdown Current decline from peak	-0.78%	-0.26%	-0.52%
Average Drawdown Average peak-to-trough decline	-4.71%	-4.94%	+0.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.82%	2.13%	+0.69%

Volatility

FESM vs. FSMDX - Volatility Comparison

Fidelity Enhanced Small Cap ETF (FESM) has a higher volatility of 6.38% compared to Fidelity Mid Cap Index Fund (FSMDX) at 4.43%. This indicates that FESM's price experiences larger fluctuations and is considered to be riskier than FSMDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FESM	FSMDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.38%	4.43%	+1.95%
Volatility (6M) Calculated over the trailing 6-month period	14.11%	10.46%	+3.65%
Volatility (1Y) Calculated over the trailing 1-year period	19.54%	13.85%	+5.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.32%	18.32%	+3.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.32%	19.35%	+1.97%

FESM vs. FSMDX - Expense Ratio Comparison

FESM has a 0.28% expense ratio, which is higher than FSMDX's 0.03% expense ratio.

Dividends

FESM vs. FSMDX - Dividend Comparison

FESM's dividend yield for the trailing twelve months is around 0.73%, less than FSMDX's 0.97% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FESM Fidelity Enhanced Small Cap ETF	0.73%	0.82%	1.08%	0.06%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
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 FESM and FSMDX in my portfolio?

With a correlation of 0.90, FESM and FSMDX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, FESM or FSMDX?

FESM has higher volatility (6.38%) compared to FSMDX (4.43%). In terms of maximum drawdown, FESM dropped -26.93% vs FSMDX's -40.35%.

Which has better risk-adjusted returns?

FESM currently has the higher Sharpe Ratio (2.66 vs 1.72), 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.