News & Trends

Why Insider Trading Data Is the Most Underrated Signal in the Market

When CEOs buy their own stock, they know something. Here's how to track legal insider trading and use it to find stocks before they make big moves.

By Truevest Team · February 5, 2026 · 9 min read

Insiders Know More Than You. Use That.

Here's a fact that most retail traders ignore: company insiders — CEOs, CFOs, directors, major shareholders — are legally required to report when they buy or sell their own company's stock. This information is public. And it's one of the most powerful signals in the market.

Why? Because insiders know more about their company than any analyst, any algorithm, or any spreadsheet. When a CEO spends $5 million of their own money buying stock, they're making a strong statement about where they think the company is headed.

Legal vs. Illegal Insider Trading

Let's be clear: we're talking about legal insider trading. Company executives are allowed to buy and sell their own stock — they just have to report it to the SEC within two business days via Form 4 filings.

Illegal insider trading is trading on material, non-public information (like knowing about an acquisition before it's announced). That's a federal crime. What we're tracking is the public, legal kind.

Why Insider Buying Is So Powerful

There's Only One Reason to Buy

Insiders sell stock for all kinds of reasons: taxes, diversification, buying a house, estate planning. Selling doesn't always mean bad news.

But insider buying? There's only one reason: they think the stock is going up. Nobody spends $1 million of their own money on shares they think will decline.

The Data Backs It Up

Academic studies have consistently shown that stocks with heavy insider buying outperform the market:

• A study by Nejat Seyhun (University of Michigan) found that insider purchases outperformed the market by 7-10% annually
• Stocks with cluster buying (multiple insiders buying within 30 days) showed even stronger outperformance
• The signal is strongest when insiders are buying in the open market (as opposed to exercising options)

What to Look For

1. Cluster Buying

One insider buying is interesting. Three or four insiders buying within the same month is a screaming signal. When multiple executives independently decide to put their own money into the stock, something positive is likely coming.

2. Buying Size

A director buying $10,000 worth of stock is meaningless for someone with a $20 million net worth. But a CEO buying $2 million? That's material. Look for purchases that are significant relative to the insider's compensation and holdings.

3. Who's Buying

Not all insiders are created equal. Prioritize:

• CEO: Highest signal value. They have the most information.
• CFO: Very strong signal. They know the financials better than anyone.
• Directors: Good signal, especially if multiple directors buy.
• 10%+ owners: Moderate signal. They have resources and information, but their buying may be strategic rather than based on near-term outlook.

4. First-Time Buying

If a CEO who has never bought stock on the open market suddenly makes a large purchase, pay close attention. This is a change in behavior — they're going out of their way to signal confidence.

5. Buying After a Decline

When a stock drops 20% and insiders start buying, it's often a sign the sell-off is overdone. They know the business better than the market does, and they're betting the stock recovers.

How to Track Insider Activity

Free Sources

• SEC EDGAR: The official source. Search for Form 4 filings. Free but clunky.
• OpenInsider: Aggregates insider transactions in a cleaner format.
• Finviz: Shows recent insider transactions on individual stock pages.

Paid/AI Tools

Truevest AI integrates insider holdings data directly into its stock recommendations. Instead of manually searching SEC filings, you see insider activity alongside technical indicators, analyst ratings, and sentiment data — all in one place. When an AI recommendation also shows recent insider buying, that's a strong confluence of signals.

Real-World Examples

JPMorgan (2020)

During the COVID crash, Jamie Dimon (CEO) bought $26 million worth of JPM stock in February-March 2020 — his first open-market purchase in years. The stock recovered from $80 to over $170 within 18 months.

Meta Platforms (2022)

When Meta stock crashed from $330 to under $100 during the 2022 bear market, multiple directors began buying shares. The stock recovered to over $500 by 2024.

Combining Insider Data with Other Signals

Insider buying is powerful alone, but it's even more powerful when combined with:

• Technical support: Stock is at a major support level AND insiders are buying
• Oversold RSI: RSI below 30 AND insiders are buying
• Bullish analyst revisions: Analysts upgrading AND insiders are buying
• Positive earnings surprise: Company just beat earnings AND insiders are buying more

When three or four of these align, you have an incredibly high-probability setup.

The Limitations

• Timing isn't perfect: Insiders buy because they believe in the long-term outlook. The stock might drop further before recovering.
• It's a medium-term signal: Don't expect a stock to pop the day after an insider buys. Think weeks to months.
• Not all buying is equal: Automatic purchase plans (10b5-1) are pre-scheduled and carry less signal than discretionary open-market purchases.

The Bottom Line

Insider trading data is free, public, and one of the most reliable predictive signals in the market. Yet most retail traders ignore it completely. Start tracking insider activity on your watchlist stocks. When the people who know the most about a company are buying with their own money, it's worth paying attention.