Generated August 8, 2026.
Overview
SPMO and VFMO are both momentum-focused equity ETFs tracking factor-based indices, but they operate in different market segments. SPMO targets large-cap momentum names within the S&P 500, while VFMO pursues momentum exposure across the broader U.S. mid-cap blend universe. Both charge identical expense ratios and distribute quarterly, making the choice hinge primarily on market-cap preference and fund scale.
How they differ
The core difference is market-cap focus: SPMO isolates momentum within large-cap S&P 500 constituents, while VFMO casts a wider net into the mid-cap space. SPMO's $21.3B in assets dwarfs VFMO's $1.83B, giving SPMO greater liquidity and tighter tracking. Both carry a 0.13% expense ratio, but SPMO yields 0.65% versus VFMO's 0.81%—a modest difference reflecting their different underlying universes. SPMO's beta of 1.28 and VFMO's 1.32 suggest both amplify market moves, though VFMO edges slightly higher.
Who each is best for
SPMO: Fits investors seeking concentrated momentum exposure within the largest U.S. companies, preferring a deeper fund with established trading volume and the simplicity of S&P 500 constituent screening.
VFMO: Fits investors willing to venture into mid-cap momentum for a higher dividend yield and exposure to smaller names where factor premiums may persist differently than in mega-cap stocks.
Key risks to know
- Momentum factor decay: Both funds concentrate in stocks showing recent strength, a factor prone to mean reversion; periods of rotation into value or defensive positioning can pressure performance sharply.
- Mid-cap volatility in VFMO: Mid-cap stocks carry higher single-name risk and lower analyst coverage than large-cap peers; VFMO's smaller asset base also elevates the risk of wider bid-ask spreads during stressed markets.
- Beta amplification: Both ETFs exhibit beta above 1.3, meaning they are likely to fall harder than the broad market during downturns and rise faster during rallies, concentrating drawdown risk for income investors.
- Holdings overlap risk: Both funds screen U.S. equities for momentum signals, so their top holdings may overlap materially; verify holdings before combining them to avoid unintended concentration.
Bottom line
If you want large-cap momentum with substantial liquidity and a proven track record since 2015, SPMO's scale and S&P 500 anchor stand out. If you're comfortable with mid-cap exposure and prioritize the higher yield, VFMO offers a different market-cap slice of the same factor. Remember that factor premiums are cyclical and past performance doesn't predict future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.