The InsiderCluster Blog
Plain-English guides to insider buying, SEC Form 4, cluster buys, and reading the market like the people who run the companies.
- 4 min read
Earnings roulette: big bets pay, bigger ones crater — August 2, 2026
Earnings roulette: big bets pay, bigger ones crater. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — August 2, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Big Tech earnings spark AI trade revival; crypto miners surge — August 1, 2026
Big Tech earnings spark AI trade revival; crypto miners surge. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — August 1, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Big Tech earnings trigger AI infrastructure rally across the board — July 31, 2026
Big Tech earnings trigger AI infrastructure rally across the board. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 31, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Fed credibility craters as Warsh spooks the market into selling — July 30, 2026
Fed credibility craters as Warsh spooks the market into selling. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 30, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Tech Chips Crater on Memory Glut While Crypto and Quantum Pop — July 29, 2026
Tech Chips Crater on Memory Glut While Crypto and Quantum Pop. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 29, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Big Tech earnings, Fed meeting loom; breadth warns — July 28, 2026
Big Tech earnings, Fed meeting loom; breadth warns. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 28, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Trump's Hormuz blockade sends tech and growth tumbling — July 27, 2026
Trump's Hormuz blockade sends tech and growth tumbling. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 27, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chips crater, oil surges, earnings dread hits Nasdaq — July 26, 2026
Chips crater, oil surges, earnings dread hits Nasdaq. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 26, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Earnings anxiety hammers tech while oil lifts energy plays — July 25, 2026
Earnings anxiety hammers tech while oil lifts energy plays. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 25, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chip selloff and oil spike trigger broad tech rout — July 24, 2026
Chip selloff and oil spike trigger broad tech rout. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 24, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Earnings season splits: AI infrastructure soars, software stumbles — July 23, 2026
Earnings season splits: AI infrastructure soars, software stumbles. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 23, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Memory chip boom overshadows oil headwinds, tech earnings loom — July 22, 2026
Memory chip boom overshadows oil headwinds, tech earnings loom. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 22, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chip rally and AI bets override geopolitical jitters; breadth sours — July 21, 2026
Chip rally and AI bets override geopolitical jitters; breadth sours. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 21, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Geopolitical Risk and Buffett's Gates Exit Weigh on Stocks — July 20, 2026
Geopolitical Risk and Buffett's Gates Exit Weigh on Stocks. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 20, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Broad selloff amid uncertainty; chip and energy stocks split — July 19, 2026
Broad selloff amid uncertainty; chip and energy stocks split. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 19, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chip Rally Fizzles as Breadth Collapses; Uncertainty Takes Over — July 18, 2026
Chip Rally Fizzles as Breadth Collapses; Uncertainty Takes Over. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 18, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Earnings beat expectations, but tech sells off anyway — July 17, 2026
Earnings beat expectations, but tech sells off anyway. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 17, 2026.
market wrapmarket moversdaily briefinsider buying - 3 min read
Market Movers — July 16, 2026
The 100 most active US stocks by volume on July 16, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market wrapmarket moversdaily briefinsider buying - 4 min read
Goldman's rate warning collides with geopolitical risk hangover — July 15, 2026
Goldman's rate warning collides with geopolitical risk hangover. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 15, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Geopolitical shock sends tech reeling; oil surges on Iran tensions — July 14, 2026
Geopolitical shock sends tech reeling; oil surges on Iran tensions. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 14, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Geopolitics weighs as tech splits; broadband drama lifts Vodafone — July 13, 2026
Geopolitics weighs as tech splits; broadband drama lifts Vodafone. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 13, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Earnings season arrives as mega-cap strength masks breadth weakness — July 12, 2026
Earnings season arrives as mega-cap strength masks breadth weakness. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 12, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chip stocks lead broad rally as narrow leadership cracks — July 11, 2026
Chip stocks lead broad rally as narrow leadership cracks. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 11, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Chip Rally Lifts Nasdaq as Sector Rotates Away From Mag 7 — July 10, 2026
Chip Rally Lifts Nasdaq as Sector Rotates Away From Mag 7. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 10, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Iran tensions lift oil and AI chips; healthcare implodes on fraud — July 9, 2026
Iran tensions lift oil and AI chips; healthcare implodes on fraud. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 9, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Samsung AI fears spark chip selloff; Vertex clinches biotech bet — July 8, 2026
Samsung AI fears spark chip selloff; Vertex clinches biotech bet. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 8, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Semiconductors and AI infrastructure stocks carry market higher — July 7, 2026
Semiconductors and AI infrastructure stocks carry market higher. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 7, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Nasdaq tanks on Fed jitters; chip stocks lead selloff — July 6, 2026
Nasdaq tanks on Fed jitters; chip stocks lead selloff. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 6, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Tech sells off; broad market treads water on holiday week — July 5, 2026
Tech sells off; broad market treads water on holiday week. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 5, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Buffett's warning lands as tech selloff deepens uncertainty — July 4, 2026
Buffett's warning lands as tech selloff deepens uncertainty. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 4, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
AI Boom Hits a Speed Bump as Chip Stocks Crater — July 3, 2026
AI Boom Hits a Speed Bump as Chip Stocks Crater. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 3, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Meta's AI Pivot Crushes Semiconductor Stocks, Reshapes Compute Market — July 2, 2026
Meta's AI Pivot Crushes Semiconductor Stocks, Reshapes Compute Market. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 2, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Semiconductor and space stocks lead as market hits new highs — July 1, 2026
Semiconductor and space stocks lead as market hits new highs. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — July 1, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Software and EVs surge as US-Iran tensions ease, semis stumble — June 30, 2026
Software and EVs surge as US-Iran tensions ease, semis stumble. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 30, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Software rebounds as geopolitical relief lifts risk appetite — June 29, 2026
Software rebounds as geopolitical relief lifts risk appetite. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 29, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Tech rotation bites ON, TXN as chip stocks stumble — June 28, 2026
Tech rotation bites ON, TXN as chip stocks stumble. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 28, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Breadth Breakdown: Tech Stumbles While Chips and Industrials Surge — June 27, 2026
Breadth Breakdown: Tech Stumbles While Chips and Industrials Surge. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 27, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Nasdaq tumbles as prediction markets debut, AI chip bets waver — June 26, 2026
Nasdaq tumbles as prediction markets debut, AI chip bets waver. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 26, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Micron earnings lift chip stocks; AI darlings stumble on margin fears — June 25, 2026
Micron earnings lift chip stocks; AI darlings stumble on margin fears. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 25, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
AI selloff hammers chips as tech support crumbles globally — June 24, 2026
AI selloff hammers chips as tech support crumbles globally. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 24, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Tech selloff deepens as megacaps stumble; Iran concerns weigh — June 23, 2026
Tech selloff deepens as megacaps stumble; Iran concerns weigh. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 23, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Geopolitical tension and chip tailwinds clash; breadth holds — June 22, 2026
Geopolitical tension and chip tailwinds clash; breadth holds. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 22, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Tech Rally Breaks the Pullback; Value Gets a Serious Look — June 21, 2026
Tech Rally Breaks the Pullback; Value Gets a Serious Look. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 21, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Nasdaq surges on AI optimism as insiders flee overvalued mega-caps — June 20, 2026
Nasdaq surges on AI optimism as insiders flee overvalued mega-caps. The day's biggest movers, the headlines driving them, and which active stocks have insider cluster buys — June 20, 2026.
market wrapmarket moversdaily briefinsider buying - 4 min read
Market Movers — June 19, 2026
The 100 most active US stocks by volume on June 19, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 5 min read
How We Measure Whether Insider Cluster Buys Beat the S&P 500
A transparent look at our methodology — how each insider cluster buy is dated, tracked, and scored against the S&P 500 from the day it formed, with no cherry-picking or hindsight.
methodologyS&P 500insider cluster buysperformancetransparency - 4 min read
Market Movers — June 18, 2026
The 100 most active US stocks by volume on June 18, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Insider Buying vs. Insider Selling: What Each Actually Signals
Insider buying and selling are not mirror images. Buys are made for one reason; sells for dozens. Here is what each actually signals — and why purchases carry far more information.
insider buyinginsider sellingForm 4signalinvesting - 4 min read
Market Movers — June 17, 2026
The 100 most active US stocks by volume on June 17, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Market Movers — June 16, 2026
The 100 most active US stocks by volume on June 16, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 5 min read
How to Read an SEC Form 4 Filing (and Spot Real Insider Conviction)
A line-by-line guide to reading an SEC Form 4 — the transaction codes, the shares/price/value columns, and the red flags vs. strong signals that separate real insider conviction from compensation noise.
Form 4SEC EDGARtransaction codesinsider buyinghow to - 4 min read
Market Movers — June 15, 2026
The 100 most active US stocks by volume on June 15, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Market Movers — June 14, 2026
The 100 most active US stocks by volume on June 14, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Market Movers — June 13, 2026
The 100 most active US stocks by volume on June 13, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 5 min read
Insider Cluster Buys, Explained: Why 3+ Insiders Buying the Same Stock Can Beat the Market
An insider cluster buy is when three or more corporate insiders buy their own company's stock within a short window. Here is what it is, why it can beat the S&P 500, and how to evaluate one.
insider cluster buysinsider buyingForm 4SECinvesting - 4 min read
Market Movers — June 12, 2026
The 100 most active US stocks by volume on June 12, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Market Movers — June 11, 2026
The 100 most active US stocks by volume on June 11, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 4 min read
Market Movers — June 10, 2026
The 100 most active US stocks by volume on June 10, 2026, the day's biggest moves and the headlines driving them, plus which also have insider cluster buys.
market moversmost activevolumedaily brief - 3 min read
How to Read Institutional Volume on the S&P 500
Volume is the second axis of every price chart and the one most investors ignore. Here is how to read trading volume on the S&P 500 and individual stocks to tell conviction from noise.
volumeS&P 500institutionaltechnical analysis
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