MFEM vs. VOO

Last updated Aug 2, 2026

MFEM (PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF) and VOO (Vanguard S&P 500 ETF) are both exchange-traded funds - MFEM is a Emerging Markets Equities fund tracking the RAFI Dynamic Multi-Factor Emerging Market Index, while VOO is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 5 years, MFEM returned 7.21%/yr vs 12.83%/yr for VOO. Their 0.67 correlation means they have sometimes moved together and sometimes differently. MFEM charges 0.49%/yr vs 0.03%/yr for VOO.

Performance

MFEM vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF (MFEM) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFEM achieves a 16.47% return, which is significantly higher than VOO's 10.16% return.

MFEM

• 1D: -0.21%
• 1M: -2.90%
• 6M: 6.30%
• YTD: 16.47%
• 1Y: 30.01%
• 3Y*: 15.79%
• 5Y*: 7.21%
• 10Y*: —
• ALL TIME*: 6.85%

VOO

• 1D: 0.71%
• 1M: 0.26%
• 6M: 8.58%
• YTD: 10.16%
• 1Y: 21.58%
• 3Y*: 19.42%
• 5Y*: 12.83%
• 10Y*: 15.14%
• ALL TIME*: 14.78%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
MFEM PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF	$581.34K	$458.22K	$623.99K
VOO Vanguard S&P 500 ETF	$3.82B	$3.78B	$5.44B

MFEM vs. VOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MFEM PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF	16.47%	25.33%	4.73%	15.14%	-19.50%	10.77%	11.33%	15.26%	-14.64%	4.86%
VOO Vanguard S&P 500 ETF	10.16%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	9.61%

Correlation

The correlation between MFEM and VOO is 0.71, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.71
Correlation (3Y) Balances recent behavior with more history.	0.63
Correlation (5Y) Shows whether the relationship held over a longer period.	0.64
Correlation (All Time) Calculated using the full available price history since Sep 6, 2017	0.67

The correlation between MFEM and VOO has been stable across timeframes, ranging from 0.63 to 0.71 - a consistent structural relationship.

MFEM vs. VOO - Sectors Allocation Comparison

Sectors	MFEM	VOO
Technology	34.0%	38.6%
Financial Services	14.4%	11.4%
Basic Materials	13.1%	1.7%
Industrials	10.1%	8.5%
Energy	7.7%	3.0%
Consumer Cyclical	7.0%	9.5%
Communication Services	4.4%	9.9%
Consumer Defensive	3.4%	4.5%
Utilities	3.3%	2.2%
Healthcare	1.4%	8.9%
Real Estate	1.0%	1.8%

Return for Risk

MFEM vs. VOO — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

MFEM

MFEM Risk / Return Rank: 53
MFEM Sharpe Ratio Rank: 54
MFEM Sortino Ratio Rank: 51
MFEM Omega Ratio Rank: 56
MFEM Calmar Ratio Rank: 55
MFEM Martin Ratio Rank: 50

VOO

VOO Risk / Return Rank: 68
VOO Sharpe Ratio Rank: 68
VOO Sortino Ratio Rank: 65
VOO Omega Ratio Rank: 66
VOO Calmar Ratio Rank: 64
VOO Martin Ratio Rank: 76

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

MFEM vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF (MFEM) and Vanguard S&P 500 ETF (VOO). 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.

	MFEM	VOO	Difference
Sharpe ratio: Return per unit of total volatility	1.31	1.53	-0.23
Sortino ratio: Return per unit of downside risk	1.82	2.13	-0.31
Omega ratio: Gain probability vs. loss probability	1.25	1.28	-0.03
Calmar ratio: Return relative to maximum drawdown	1.97	2.21	-0.24
Martin ratio: Return relative to average drawdown	5.82	9.44	-3.62

MFEM vs. VOO - Sharpe Ratio Comparison

The current MFEM Sharpe Ratio is 1.31, which is comparable to the VOO Sharpe Ratio of 1.53. The chart below compares the historical Sharpe Ratios of MFEM and VOO, 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

MFEM vs. VOO - Drawdown Comparison

The maximum MFEM drawdown since its inception was -43.32%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for MFEM and VOO.

Drawdown Indicators

	MFEM	VOO	Difference
Max Drawdown Largest peak-to-trough decline	-43.32%	-33.99%	-9.33%
Max Drawdown (1Y) Largest decline over 1 year	-15.05%	-8.90%	-6.15%
Max Drawdown (3Y) Largest decline over 3 years	-19.22%	-18.69%	-0.53%
Max Drawdown (5Y) Largest decline over 5 years	-30.78%	-24.52%	-6.26%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.99%	—
Current Drawdown Current decline from peak	-12.43%	-1.38%	-11.05%
Average Drawdown Average peak-to-trough decline	-11.43%	-3.67%	-7.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.08%	2.08%	+3.00%

Volatility

MFEM vs. VOO - Volatility Comparison

PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF (MFEM) has a higher volatility of 7.50% compared to Vanguard S&P 500 ETF (VOO) at 3.54%. This indicates that MFEM's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFEM	VOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.50%	3.54%	+3.96%
Volatility (6M) Calculated over the trailing 6-month period	20.84%	10.10%	+10.74%
Volatility (1Y) Calculated over the trailing 1-year period	22.65%	12.82%	+9.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.42%	16.93%	+0.49%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.70%	18.01%	+1.69%

MFEM vs. VOO - Expense Ratio Comparison

MFEM has a 0.49% expense ratio, which is higher than VOO's 0.03% expense ratio.

Dividends

MFEM vs. VOO - Dividend Comparison

MFEM's dividend yield for the trailing twelve months is around 2.37%, more than VOO's 1.07% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFEM PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF	2.37%	2.77%	5.89%	4.01%	7.01%	29.96%	1.70%	2.37%	1.18%	0.21%	0.00%	0.00%
VOO Vanguard S&P 500 ETF	1.07%	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 MFEM and VOO in my portfolio?

MFEM and VOO have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFEM or VOO?

MFEM has higher volatility (7.50%) compared to VOO (3.54%). In terms of maximum drawdown, MFEM dropped -43.32% vs VOO's -33.99%.

Which ETF is better, MFEM or VOO?

On 5-year performance, VOO leads with 12.83% vs 7.21% for MFEM. On fees, VOO is cheaper at 0.03% per year. On volatility, VOO has been the lower-risk option at 3.54%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MFEM or VOO?

Over the 5-year period, VOO has performed better with a 12.83% return vs 7.21%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MFEM or VOO?

VOO is cheaper with a 0.03% expense ratio, compared with 0.49% for MFEM.

Which ETF pays a higher dividend yield, MFEM or VOO?

MFEM has the higher dividend yield at 2.37%, compared with 1.07% for VOO.

What is the main difference between MFEM and VOO?

MFEM is categorized as Emerging Markets Equities, while VOO is S&P 500. MFEM tracks RAFI Dynamic Multi-Factor Emerging Market Index, while VOO tracks S&P 500 Index. They also come from different issuers: PIMCO and Vanguard. Their fees differ too: 0.49% for MFEM and 0.03% for VOO.

Which has better risk-adjusted returns?

VOO currently has the higher Sharpe Ratio (1.53 vs 1.31), 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.