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Insider Sentiment

M
Marcus Thorne
Last Updated: February 1, 2026
Plain English Definition

Insider sentiment measures the collective buying and selling behavior of company insiders to gauge their confidence in future stock performance. Bullish sentiment is indicated by net buying, while bearish sentiment shows net selling. Sentiment indicators aggregate Form 4 data into actionable signals.

The Trader's Take

The Signal

Strong bullish sentiment with cluster buys historically precedes outperformance. Sudden shifts from buying to selling can be early warning signs.

The Noise

Individual sales for diversification purposes don't indicate sentiment. 10b5-1 plan trades are non-discretionary.

Actionable Insights

  • 1
    Focus on open market purchases as the purest sentiment signal.
  • 2
    Look for cluster buys where 3+ insiders buy within 30 days.
  • 3
    Compare sentiment across time periods (30/60/90 days).
  • 4
    Weight CEO/CFO transactions more heavily than other insiders.

Regulatory Context & Context

Insider sentiment is derived from Form 4 filings, which provide transparency into executive trading activity. The SEC mandates these disclosures to help investors understand insider behavior and prevent information asymmetry.

Common Misconceptions

Insider sentiment isn't a perfect predictor—it's one input among many.

Bearish sentiment doesn't always mean the stock will fall—context matters.

Sentiment indicators should filter out non-discretionary transactions.

Frequently Asked Questions

How is insider sentiment measured?

Insider sentiment is typically calculated by comparing buy volume versus sell volume over a period (30/60/90 days), weighting transactions by size and insider role, and excluding non-discretionary trades like 10b5-1 plans.

What is bullish insider sentiment?

Bullish sentiment occurs when insiders are net buyers of company stock, indicating confidence in future performance. The strongest bullish signals come from cluster buys and large open market purchases.

Does insider sentiment predict stock price?

Research shows insider buying has historically preceded outperformance, while selling is less predictive. However, sentiment should be combined with fundamental analysis for best results.

On This Page

Trader's TakeRegulatory ContextCommon MisconceptionsF.A.Q.

Related Intelligence

Trading Terms
Cluster Buy
Trading Terms
Informative Buy
Trading Terms
Open Market Purchase
Regulatory
Rule 10b5-1

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