# Momentum Trading > Momentum trading buys assets that are rising fastest and sells those falling fastest. Learn the research, intraday and multi month methods and momentum crashes. Source: https://learn.tradelabsai.com/strategies/momentum-trading/ Track: Strategies and Styles · Level: Intermediate · Updated: 2026-10-03 Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice. Cite as: TradeLabs Learn, "Momentum Trading", https://learn.tradelabsai.com/strategies/momentum-trading/ Momentum trading is based on a simple observation: assets that have performed strongly recently tend to keep performing strongly for a while, and weak assets tend to stay weak. Momentum traders buy strength and sell weakness instead of hunting for bargains. The effect has been documented across stocks, bonds, currencies and commodities and is one of the most studied patterns in finance. It shows up at very different timescales, from intraday surges to multi month trends. ## The research In 1993, Narasimhan Jegadeesh and Sheridan Titman showed that US stocks that had performed best over the previous 3 to 12 months tended to outperform those that had performed worst over the following months. This "cross sectional momentum" has since been found in many countries and asset classes. A related effect, "time series momentum", looks at each market's own past return. See [Trend Following](https://learn.tradelabsai.com/strategies/trend-following/) and [Momentum Factor](https://learn.tradelabsai.com/research/momentum-factor/). ## Types of momentum trading | Type | Timescale | How it works | |---|---|---| | Cross sectional momentum | Months | Rank assets by past return; buy the top, avoid or short the bottom | | Time series momentum | Weeks to months | Go long markets with positive past returns, short negative | | Swing momentum | Days to weeks | Buy stocks breaking to new highs on strong volume | | Intraday momentum | Minutes to hours | Trade stocks with big moves and unusual volume on news | ## Measuring momentum - **Past return:** the most common measure, for example the 12 month return excluding the most recent month. Skipping the last month avoids the short term reversal effect. See [Short and Long-Term Reversal](https://learn.tradelabsai.com/research/short-and-long-term-reversal/). - **Rate of change:** percentage change over a lookback. See [Rate of Change and Momentum](https://learn.tradelabsai.com/indicators/rate-of-change-and-momentum/). - **Relative strength:** performance compared with an index or sector. - **New highs:** assets at or near 52 week highs. - **Volume:** strong moves on high [Relative Volume](https://learn.tradelabsai.com/volume/relative-volume/) suggest real participation. **Example: A monthly momentum portfolio** At the start of each month, an investor ranks 100 large stocks by their return from 12 months ago to 1 month ago. They buy the top 10 in equal amounts and hold for one month, then repeat. Each month, a few stocks drop out of the top 10 and are replaced. Transaction costs matter: if 40% of the portfolio changes each month and round trip costs are 0.2%, the strategy pays about 0.08% a month, close to 1% a year. See [Signal Turnover, Breadth and Neutralization](https://learn.tradelabsai.com/research/signal-turnover/). ## Intraday momentum Short term momentum traders look for stocks "in play": big gaps, earnings surprises or news with unusually high volume. They enter on pullbacks or breakouts of intraday levels, often with tight stops, and aim to ride the move for minutes or hours. Liquidity, spread and halts are major risks with small, fast moving stocks. See [Trading Halts and Circuit Breakers](https://learn.tradelabsai.com/markets/trading-halts/) and [News Trading](https://learn.tradelabsai.com/strategies/news-trading/). ## Why momentum might work Explanations include: - **Underreaction:** investors adjust slowly to new information. See [Anchoring](https://learn.tradelabsai.com/psychology/anchoring/). - **Herding:** buying attracts more buying as others notice. - **Institutional flows:** large funds build positions over weeks. - **Risk:** momentum may be compensation for crash risk. ## Momentum crashes Momentum has occasional severe losses, usually when beaten down assets rebound sharply after a market bottom. In 2009, as markets rebounded, the past losers rallied far more than past winners and long short momentum portfolios suffered large losses within a few months. Kent Daniel and Tobias Moskowitz documented these "momentum crashes". Controlling volatility and avoiding concentrated short positions in heavily sold assets can reduce the damage. ## Momentum vs mean reversion Momentum and [Mean Reversion](https://learn.tradelabsai.com/strategies/mean-reversion/) seem contradictory, but they operate at different horizons. Research generally finds short term reversal (up to a month), momentum over 3 to 12 months and long term reversal over several years. Knowing which horizon you trade is essential. ## Common mistakes - **Buying too late** in an extended move with a wide stop. - **Ignoring turnover costs** in frequently rebalanced portfolios. - **Concentrating in one sector** that happens to lead. - **Not planning for sudden reversals.** Momentum can be measured directly with the [Rate of Change and Momentum](https://learn.tradelabsai.com/indicators/rate-of-change-and-momentum/) indicator, a useful filter for momentum entries. ## Frequently asked questions ### What is momentum trading? A strategy that buys assets with strong recent performance and sells or avoids those with weak performance, expecting the trends to persist. ### Does momentum investing work? Momentum has been documented across many markets and decades, but it has periods of poor performance and occasional sharp crashes. ### What is the best lookback period for momentum? Studies often use 3 to 12 months, commonly skipping the most recent month, but results vary by market and should be tested. Next, learn the opposite effect in [Mean Reversion](https://learn.tradelabsai.com/strategies/mean-reversion/). ## Sources - Jegadeesh, N. and Titman, S., Returns to Buying Winners and Selling Losers, Journal of Finance, 1993. Summary: [Wikipedia, Momentum (finance)](https://en.wikipedia.org/wiki/Momentum_%28finance%29) ## Continue learning - Next lesson: [Mean Reversion](https://learn.tradelabsai.com/strategies/mean-reversion/) - Previous lesson: [Range Trading](https://learn.tradelabsai.com/strategies/range-trading/) - Related: [Range Trading](https://learn.tradelabsai.com/strategies/range-trading/): Range trading buys near support and sells near resistance while price moves sideways. Learn how to identify ranges, time entries and exit when a range breaks. - Related: [Trend Following](https://learn.tradelabsai.com/strategies/trend-following/): Trend following buys markets that are rising and sells those that are falling. Learn the rules, the evidence, typical results and why patience pays. - Related: [Momentum Factor](https://learn.tradelabsai.com/research/momentum-factor/): The momentum factor buys recent winners and sells recent losers. Learn how it is built, the evidence across markets, momentum crashes and how to manage them. - Related: [Rate of Change and Momentum](https://learn.tradelabsai.com/indicators/rate-of-change-and-momentum/): ROC and the momentum indicator measure how much price has changed over a set period. Learn the formulas, zero line signals, divergence and momentum strategies. - Related: [Relative Volume](https://learn.tradelabsai.com/volume/relative-volume/): Relative volume compares current volume with its normal level. Learn the RVOL formula, time of day adjustments, scanning for stocks in play and how to use it. - Related: [Mean Reversion](https://learn.tradelabsai.com/strategies/mean-reversion/): Mean reversion trades bet that prices stretched far from their average will come back. Learn the signals, z scores, examples and the risk of fading strong trends.