VOO vs. FSMAX

Last updated Jun 13, 2026

VOO (Vanguard S&P 500 ETF) and FSMAX (Fidelity Extended Market Index Fund) are both funds - VOO is a S&P 500 fund tracking the S&P 500 Index, while FSMAX is a Mid Cap Blend Equities fund tracking the Dow Jones U.S. Completion Total Stock Market Index. Both are passively managed. Over the past 10 years, VOO returned 15.50%/yr vs 12.22%/yr for FSMAX. Their correlation of 0.87 suggests significant overlap in exposure. VOO charges 0.03%/yr vs 0.04%/yr for FSMAX.

Performance

VOO vs. FSMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P 500 ETF (VOO) and Fidelity Extended Market Index Fund (FSMAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VOO achieves a 9.08% return, which is significantly lower than FSMAX's 13.83% return. Over the past 10 years, VOO has outperformed FSMAX with an annualized return of 15.50%, while FSMAX has yielded a comparatively lower 12.22% annualized return.

VOO

• 1D: 0.55%
• 1M: -0.07%
• YTD: 9.08%
• 6M: 9.44%
• 1Y: 24.36%
• 3Y*: 20.95%
• 5Y*: 13.43%
• 10Y*: 15.50%

FSMAX

• 1D: 2.96%
• 1M: 4.31%
• YTD: 13.83%
• 6M: 11.67%
• 1Y: 27.30%
• 3Y*: 18.98%
• 5Y*: 6.06%
• 10Y*: 12.22%

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

VOO vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VOO Vanguard S&P 500 ETF	9.08%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	21.77%
FSMAX Fidelity Extended Market Index Fund	13.83%	11.40%	16.99%	25.36%	-26.44%	12.41%	32.28%	28.01%	-9.44%	18.04%

Correlation

The correlation between VOO and FSMAX 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 (10Y) Calculated over the trailing 10-year period	0.86
Correlation (All Time) Calculated using the full available price history since Sep 8, 2011	0.87

The correlation between VOO and FSMAX has been stable across timeframes, ranging from 0.83 to 0.87 - a consistent structural relationship.

Return for Risk

VOO vs. FSMAX — Risk / Return Rank

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

VOO

VOO Risk / Return Rank: 70
VOO Sharpe Ratio Rank: 71
VOO Sortino Ratio Rank: 69
VOO Omega Ratio Rank: 71
VOO Calmar Ratio Rank: 63
VOO Martin Ratio Rank: 76

FSMAX

FSMAX Risk / Return Rank: 51
FSMAX Sharpe Ratio Rank: 44
FSMAX Sortino Ratio Rank: 43
FSMAX Omega Ratio Rank: 40
FSMAX Calmar Ratio Rank: 70
FSMAX Martin Ratio Rank: 58

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.

VOO vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P 500 ETF (VOO) and Fidelity Extended Market Index Fund (FSMAX). 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.

	VOO	FSMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.99	1.53	+0.47
Sortino ratio: Return per unit of downside risk	2.70	2.16	+0.54
Omega ratio: Gain probability vs. loss probability	1.36	1.26	+0.10
Calmar ratio: Return relative to maximum drawdown	2.75	2.65	+0.10
Martin ratio: Return relative to average drawdown	12.42	9.29	+3.14

VOO vs. FSMAX - Sharpe Ratio Comparison

The current VOO Sharpe Ratio is 1.99, which is higher than the FSMAX Sharpe Ratio of 1.53. The chart below compares the historical Sharpe Ratios of VOO and FSMAX, 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

VOO vs. FSMAX - Drawdown Comparison

The maximum VOO drawdown since its inception was -33.99%, smaller than the maximum FSMAX drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for VOO and FSMAX.

Drawdown Indicators

	VOO	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-33.99%	-50.55%	+16.56%
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	-10.26%	+1.36%
Max Drawdown (3Y) Largest decline over 3 years	-18.69%	-26.82%	+8.13%
Max Drawdown (5Y) Largest decline over 5 years	-24.52%	-36.31%	+11.79%
Max Drawdown (10Y) Largest decline over 10 years	-33.99%	-50.55%	+16.56%
Current Drawdown Current decline from peak	-2.34%	-1.04%	-1.30%
Average Drawdown Average peak-to-trough decline	-3.68%	-12.15%	+8.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.97%	2.92%	-0.95%

Volatility

VOO vs. FSMAX - Volatility Comparison

The current volatility for Vanguard S&P 500 ETF (VOO) is 4.34%, while Fidelity Extended Market Index Fund (FSMAX) has a volatility of 6.48%. This indicates that VOO experiences smaller price fluctuations and is considered to be less risky than FSMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VOO	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.34%	6.48%	-2.14%
Volatility (6M) Calculated over the trailing 6-month period	9.58%	13.35%	-3.77%
Volatility (1Y) Calculated over the trailing 1-year period	12.27%	17.80%	-5.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.88%	22.42%	-5.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.03%	30.26%	-12.23%

VOO vs. FSMAX - Expense Ratio Comparison

VOO has a 0.03% expense ratio, which is lower than FSMAX's 0.04% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VOO vs. FSMAX - Dividend Comparison

VOO's dividend yield for the trailing twelve months is around 1.05%, more than FSMAX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSMAX Fidelity Extended Market Index Fund	0.50%	0.57%	0.48%	1.17%	1.90%	7.49%	2.14%	4.30%	6.09%	5.44%	4.85%	6.34%
VOO Vanguard S&P 500 ETF	1.05%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both VOO and FSMAX in my portfolio?

VOO and FSMAX 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, VOO or FSMAX?

FSMAX has higher volatility (6.48%) compared to VOO (4.34%). In terms of maximum drawdown, VOO dropped -33.99% vs FSMAX's -50.55%.

Which has better risk-adjusted returns?

VOO currently has the higher Sharpe Ratio (1.99 vs 1.53), 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.