Momentum strategy: Answer Guide 2027
Momentum strategy buys assets that have been rising and shorts (or avoids) those that have been falling — betting that trends persist. It is one of the most empirically robust anomalies in finance, documented across asset classes and centuries. In a momentum interview, explain the evidence, the behavioral rationale, and the crash risk.
Momentum Interview Questions: What They Test
The evidence first: cross-sectional momentum (winners vs losers over 6–12 months) and time-series momentum (trend following) have delivered premia across equities, bonds, currencies, and commodities in extensive academic research. The behavioral story: underreaction to news plus herding and feedback loops stretch trends beyond fundamentals.
The crash risk is the essential caveat. Momentum suffers violent reversals at turning points — past losers snap back hardest in recoveries, inflicting the strategy's worst drawdowns exactly when markets rebound. Practitioners manage this with volatility scaling, stop discipline, and awareness that momentum is a "short volatility" style payoff in disguise.
How to Answer a Momentum Interview Question
- Define it. "Buy winners, sell losers — the bet that established trends continue."
- Cite the robustness. "Documented across asset classes and long histories — among the most persistent anomalies in finance."
- Explain the behavior. "Initial underreaction to news, then herding and feedback loops extend the trend."
- Warn of crashes. "Momentum crashes at turning points — losers rebound fastest in recoveries, causing sharp drawdowns."
Common Mistakes in Momentum Interview Answers
- Presenting it as risk-free alpha. Momentum's crash risk is severe and concentrated — never omit it.
- Confusing with trend-following only. Cross-sectional (relative) and time-series (absolute) momentum are distinct implementations.
- Ignoring implementation costs. High turnover means transaction costs bite — net-of-cost momentum is the honest measure.
Momentum's persistence alongside its crash risk makes it the perfect interview topic — evidence, behavior, and risk management in one answer.
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FAQ
Q: What is the difference between cross-sectional and time-series momentum? A: Cross-sectional momentum ranks assets against each other (long winners, short losers); time-series momentum trades each asset on its own past trend.
Q: Why does momentum work? A: Leading explanations combine investor underreaction to news with herding and feedback effects that extend price trends.
Q: What is momentum crash risk? A: The tendency for momentum strategies to suffer severe losses at market turning points, when past losers rebound sharply.
Q: How do practitioners manage momentum risk? A: Through volatility targeting, stop-loss discipline, and diversifying across assets and momentum horizons.
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