Momentum trading is one of the most popular strategies in the market. The idea is simple: buy what is going up and sell what is going down. But while the concept is straightforward, the assumptions many traders make about momentum are often wrong.
Here are seven momentum trading myths that could be hurting your portfolio.
Momentum Trading Myths
1. Momentum always continues
One of the most common momentum misconceptions is that a stock moving up will keep moving up. In reality, momentum carries reversal risk. Studies by Jegadeesh and Titman show that while momentum tends to persist over 3 to 12 months, it frequently reverses after that period.
Traders who assume momentum is a one-way street often get caught in sharp reversals. Understanding momentum vs mean reversion is critical to knowing when a trend is likely to fade.
2. Strong stocks cannot fall
Just because a stock has been rising for months does not mean it is immune to a selloff. Even the strongest momentum names can drop 20% or more in a matter of days when sentiment shifts or earnings disappoint.
The 2021 tech correction is a prime example. High-momentum names like Peloton, Zoom, and Shopify lost more than half their value despite strong prior performance. Strength is not a shield.
3. Late entry is safe
Many traders see a stock that has risen 50% and assume there is still room to run. This is chasing risk. The later you enter a momentum trade, the closer you are to the point of reversal, and the worse your risk-reward ratio becomes.
Smart momentum traders focus on early trend identification using tools like the stochastic oscillator rather than entering after the move has already played out.
4. Momentum ignores fundamentals
This myth suggests that momentum trading is purely technical, disconnected from a company's actual business. In practice, the strongest and most persistent momentum is often driven by fundamental catalysts: earnings beats, revenue acceleration, or sector tailwinds.
Research by Robert Novy-Marx shows that stocks with strong fundamentals tend to exhibit better momentum characteristics. Momentum and fundamentals are not opposites. They frequently reinforce each other.
5. Momentum works in all market conditions
Momentum strategies perform very differently depending on market conditions. They tend to work best during trending markets with clear directional bias and struggle during choppy, range-bound environments.
During the 2020 COVID crash, many momentum portfolios suffered large drawdowns as volatility spiked and correlations surged. Any strategy that depends on trends will underperform when trends break down.
6. More momentum equals less risk
Some traders believe that the faster a stock is rising, the safer it is to own. This is the opposite of reality. Stocks with extreme momentum often carry the highest volatility and the steepest reversal risk.
When a stock goes parabolic, it attracts speculative buying that can unwind just as fast. Position sizing becomes critical. Concentrated bets on high-momentum names are one of the fastest ways to blow up a portfolio.
7. Momentum trading is the same as trend following
Momentum and trend following share similarities but are distinct strategies. Momentum typically focuses on relative strength over shorter timeframes, comparing stocks against each other. Trend following focuses on absolute price direction over longer periods, often across asset classes.
The SPMO ETF tracks the S&P 500 Momentum factor, giving investors systematic exposure to momentum without the need to pick individual stocks.
Conclusion
Momentum trading remains a well-documented and effective strategy, but only when applied with realistic expectations. Momentum does not always continue, strong stocks can and do fall, and late entries often end badly. The key is combining momentum signals with proper risk management, disciplined entry points, and an understanding of current market conditions.
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FAQ
What is momentum trading?
Momentum trading is a strategy that involves buying securities that have been rising and selling those that have been falling, based on the expectation that recent price trends will continue in the short to medium term.
How long does momentum typically last?
Academic research suggests momentum effects tend to persist over 3 to 12 months. Beyond that window, returns often reverse, which is why timing and exit discipline are critical.
Is momentum trading suitable for beginners?
Momentum trading requires active monitoring and disciplined risk management. Beginners may find it easier to gain momentum exposure through ETFs like SPMO rather than trying to pick individual momentum stocks.
References:
- Quant Investing, Busting the top 10 myths of momentum investing, 2026.
- Morningstar, 10 Myths of Momentum Investing, 2026
