FESM vs. VIEIX

Last updated Jun 4, 2026

FESM (Fidelity Enhanced Small Cap ETF) and VIEIX (Vanguard Extended Market Index Fund Institutional Shares) are both funds - FESM is a Small Cap Blend Equities fund actively managed by Fidelity, while VIEIX is a Mid Cap Blend Equities fund managed by Vanguard. Over the past year, FESM returned 46.73% vs 30.15% for VIEIX. With a 0.96 correlation, they move nearly in lockstep. FESM charges 0.28%/yr vs 0.05%/yr for VIEIX.

Performance

FESM vs. VIEIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Enhanced Small Cap ETF (FESM) and Vanguard Extended Market Index Fund Institutional Shares (VIEIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FESM achieves a 19.64% return, which is significantly higher than VIEIX's 14.93% return.

FESM

• 1D: -1.51%
• 1M: 3.13%
• YTD: 19.64%
• 6M: 19.11%
• 1Y: 46.73%
• 3Y*: —
• 5Y*: —
• 10Y*: —

VIEIX

• 1D: 1.07%
• 1M: 5.81%
• YTD: 14.93%
• 6M: 13.66%
• 1Y: 30.15%
• 3Y*: 20.15%
• 5Y*: 6.92%
• 10Y*: 12.20%

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

FESM vs. VIEIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
FESM Fidelity Enhanced Small Cap ETF	19.64%	17.88%	16.22%	12.19%
VIEIX Vanguard Extended Market Index Fund Institutional Shares	14.93%	11.42%	15.49%	13.59%

Correlation

The correlation between FESM and VIEIX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (All Time) Calculated using the full available price history since Nov 21, 2023	0.96

The correlation between FESM and VIEIX has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.

FESM vs. VIEIX - Sectors Allocation Comparison

Sectors	FESM	VIEIX
Technology	21.6%	19.8%
Industrials	19.1%	19.3%
Healthcare	15.7%	13.3%
Financial Services	14.8%	14.6%
Consumer Cyclical	7.4%	9.7%
Energy	7.2%	5.1%
Real Estate	4.2%	6.0%
Basic Materials	3.5%	4.2%
Communication Services	3.1%	3.3%
Utilities	2.0%	2.0%
Consumer Defensive	1.4%	2.7%

Return for Risk

FESM vs. VIEIX — Risk / Return Rank

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

FESM

FESM Risk / Return Rank: 76
FESM Sharpe Ratio Rank: 75
FESM Sortino Ratio Rank: 72
FESM Omega Ratio Rank: 66
FESM Calmar Ratio Rank: 84
FESM Martin Ratio Rank: 82

VIEIX

VIEIX Risk / Return Rank: 47
VIEIX Sharpe Ratio Rank: 41
VIEIX Sortino Ratio Rank: 39
VIEIX Omega Ratio Rank: 36
VIEIX Calmar Ratio Rank: 66
VIEIX Martin Ratio Rank: 55

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. VIEIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Enhanced Small Cap ETF (FESM) and Vanguard Extended Market Index Fund Institutional Shares (VIEIX). 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.

	FESM	VIEIX	Difference
Sharpe ratio: Return per unit of total volatility	2.48	1.87	+0.61
Sortino ratio: Return per unit of downside risk	3.34	2.61	+0.74
Omega ratio: Gain probability vs. loss probability	1.41	1.32	+0.09
Calmar ratio: Return relative to maximum drawdown	4.61	3.13	+1.48
Martin ratio: Return relative to average drawdown	16.60	11.08	+5.52
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FESM vs. VIEIX - Sharpe Ratio Comparison

The current FESM Sharpe Ratio is 2.48, which is higher than the VIEIX Sharpe Ratio of 1.87. The chart below compares the historical Sharpe Ratios of FESM and VIEIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FESM	VIEIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.48	1.87	+0.61
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.31	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.55	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.29	0.40	+0.89

Drawdowns

FESM vs. VIEIX - Drawdown Comparison

The maximum FESM drawdown since its inception was -26.93%, smaller than the maximum VIEIX drawdown of -58.03%. Use the drawdown chart below to compare losses from any high point for FESM and VIEIX.

Drawdown Indicators

	FESM	VIEIX	Difference
Max Drawdown Largest peak-to-trough decline	-26.93%	-58.03%	+31.10%
Max Drawdown (1Y) Largest decline over 1 year	-10.18%	-10.25%	+0.07%
Max Drawdown (3Y) Largest decline over 3 years	—	-26.84%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-36.32%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-41.62%	—
Current Drawdown Current decline from peak	-1.59%	0.00%	-1.59%
Average Drawdown Average peak-to-trough decline	-4.79%	-13.84%	+9.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.82%	2.89%	-0.07%

Volatility

FESM vs. VIEIX - Volatility Comparison

Fidelity Enhanced Small Cap ETF (FESM) has a higher volatility of 5.64% compared to Vanguard Extended Market Index Fund Institutional Shares (VIEIX) at 4.69%. This indicates that FESM's price experiences larger fluctuations and is considered to be riskier than VIEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FESM	VIEIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.64%	4.69%	+0.95%
Volatility (6M) Calculated over the trailing 6-month period	13.32%	12.46%	+0.86%
Volatility (1Y) Calculated over the trailing 1-year period	18.98%	17.17%	+1.81%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.26%	22.34%	-1.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.26%	22.36%	-1.10%

FESM vs. VIEIX - Expense Ratio Comparison

FESM has a 0.28% expense ratio, which is higher than VIEIX's 0.05% expense ratio.

Dividends

FESM vs. VIEIX - Dividend Comparison

FESM's dividend yield for the trailing twelve months is around 0.53%, less than VIEIX's 1.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FESM Fidelity Enhanced Small Cap ETF	0.53%	0.82%	1.08%	0.06%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
VIEIX Vanguard Extended Market Index Fund Institutional Shares	1.01%	1.14%	1.10%	1.26%	1.16%	1.14%	1.08%	1.31%	1.67%	1.27%	1.45%	1.37%

Frequently Asked Questions

Can I hold both FESM and VIEIX in my portfolio?

With a correlation of 0.95, FESM and VIEIX 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 VIEIX?

FESM has higher volatility (5.64%) compared to VIEIX (4.69%). In terms of maximum drawdown, FESM dropped -26.93% vs VIEIX's -58.03%.

Which has better risk-adjusted returns?

FESM currently has the higher Sharpe Ratio (2.48 vs 1.87), 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.