What is Momentum Investing? How it Works and Why Investors Use it

Momentum investing means buying stocks with strong upward momentum and selling when it slows. That's why it is also called the ‘buy high, sell higher’ strategy. Some momentum investors ignore falling stocks, focusing instead on assets showing sustained strength.

In this article, we will look at the features of momentum investing, why investors use it, and how it works.

Key Takeaways

• Momentum investing is buying securities that have recently performed well in price. The strategy is often referred to as ‘buy high, sell higher’.
• Momentum investors look to capitalize on trends that continue for the short to medium term.
• You can also use technical analysis to identify momentum, including moving averages and the Relative Strength Index (RSI).
• Momentum strategies can also be used through mutual funds.
• Sudden trend reversals and market volatility are among the key risks.

What is Momentum Investing?

Momentum investing involves both individual stocks and specialised mutual funds, relying on market data and quantitative rules rather than traditional fundamental metrics. As market conditions change rapidly, momentum strategies require active monitoring compared to traditional buy-and-hold investing.

This differs fundamentally from a traditional value investor:

Value investor: Asks whether a company is trading at a discount to its intrinsic value.

Momentum investor: Asks whether a security has enough relative strength for its current trend to continue.

Momentum investors do not purchase stocks at random simply because their prices are rising. Instead, they rely on technical indicators and market data to isolate securities with true relative strength.

The ‘Buy High, Sell Higher’ Approach

A simple way to understand momentum investing is ‘buy high, sell higher.’ While traditional investing emphasizes buying low and selling high, momentum investing flips this logic.

Trading Stage	Action & Price Level	Investor Strategy & Rationale
Initial Price Move	Stock climbs from ₹100 to ₹120 on strong trading volume.	The asset demonstrates clear relative strength and institutional accumulation, attracting the attention of momentum traders.
Entry Point	Investor buys at ₹120.	Rejecting the traditional ‘buy low’ approach, the momentum investor enters after the rise because technical indicators confirm the trend is robust.
Target Exit	Investor sells at ₹140.	The position is closed to capture the intermediate gain before momentum wanes or a trend reversal occurs.

How does Momentum Investing Work?

Momentum investing is usually systematic.

1. Identify the highest tier of equities by measuring their price movement relative to the market or peers.
2. Technical analysis of price trends using specific indicators; for instance, a stock trading above its 50-day Exponential Moving Average (EMA) indicates short-term strength compared to its medium-term price history, while an RSI value above 70 is often used by traders to confirm strong upward momentum (or overbought conditions).
3. Enter a position when the security fulfills momentum criteria. This is usually after gains have already happened.
4. Continue monitoring the position for indications of slowing momentum.
5. Exit the position when momentum starts to wane or the trend reverses, following a predetermined exit plan to avoid losses due to unexpected reversals.

Unlike individual momentum trading, passive momentum mutual funds adjust their holdings through systematic semi-annual rebalancing (typically occurring in June and December). During these periods, stocks losing relative strength are replaced by higher-performing equities, leading to a higher Portfolio Turnover Ratio than traditional buy-and-hold index funds.

Momentum Mutual Funds in India: The SEBI & Benchmark Framework

In India, most momentum funds operate as passive index funds or exchange-traded funds (ETFs) tied to established benchmark indices like the Nifty200 Momentum 30 Index, providing a structured, rule-based approach to the strategy.

How do Investors Identify Momentum?

Momentum investors use different methods to identify securities with price momentum.

The latest price performance measures an asset's growth relative to peers over time.

Moving averages are used to smooth out short-term price movements and identify the general trend. Prices above a large moving average can indicate an uptrend.

High trading volume and large price swings are evidence of increased investor interest in the market.

One approach to evaluate momentum is the Relative Strength Index (RSI). It measures the size and speed of recent price changes.

Momentum investors deploy a combination of indicators, as no single measure can anticipate the market’s future behavior with any degree of precision.

Benefits of Momentum Investing

• Capitalize on intermediate price trends: Provides investors with structured opportunities to ride strong market movements and anticipate continued upside potential.
• Rules-based discipline: Employs explicit entry and exit criteria that minimize emotional decision-making and impulsive trades.
• Asset versatility: Flexible enough to be applied across individual equities, specialist funds, and exchange-traded products.
• Market leader identification: Uses systematic momentum screens to pinpoint market leaders capturing the heaviest buying pressure and attention.

Risks of Momentum Investing

Momentum investing can offer opportunities, but it also comes with several risks.

Risk Factor	Description	Potential Impact
Sudden Trend Reversals	Market trends can reverse unexpectedly, especially when entering near a peak.	Can lead to rapid capital losses as prices drop swiftly.
Higher Volatility	Momentum assets experience sharp price swings driven by shifting market sentiment.	Increases portfolio stress and drawdown depth during market shifts.
False Signals	Technical indicators can occasionally point to momentum right as a trend ends.	Leads to mistimed entries and immediate unrealised losses.
Requires Active Monitoring	Demands regular tracking of positions to catch early signs of weakening momentum.	Involves higher time commitment and vigilance from the investor.
Choppy Markets	Momentum strategies struggle in sideways or range-bound markets due to frequent reversals.	Generates false signals, increased trading frequency, and higher transaction costs.