Blog
Educational articles on insider trading, SEC filings, and market insights.
Hedge Fund Crowded Trades and the 13F Signal: How to Spot Crowding Risk
When too many hedge funds own the same stock, popularity becomes a risk, not reassurance. Learn to score crowding from free 13F data, with two real 2026 case studies.
SEC Semiannual Reporting & Form 10-S: What It Means for Insider Trading Signals
The SEC proposes replacing quarterly 10-Q filings with a semiannual Form 10-S. Here's what that shift does to insider blackout windows, MNPI accumulation, and the Form 4 signals retail investors depend on.
Stock Buyback Rule 10b-18: The Insider Signal Investors Miss
Rule 10b-18 governs how companies buy back their own shares. Learn the four safe harbor conditions, how the 2023 disclosure rule was vacated, and how to read Form 4 insider selling alongside buyback announcements.
Do Members of Congress Beat the Stock Market?
Do members of Congress beat the stock market? Evidence from two decades of research — and why only committee leaders generate real alpha after 2012.
Opportunistic vs. Routine Insider Trading: How to Filter Form 4 Signal
Most Form 4 purchases are routine compensation-cycle trades that carry zero predictive power. Learn how to separate them from opportunistic trades — the subset that actually generates abnormal returns.
The SEC Whistleblower Program Explained: Awards, Tips, and What It Means for Enforcement
How the SEC whistleblower program works — award mechanics (10–30%), Form TCR tips, anti-retaliation protections, and what FY2025's 27,000 tips reveal about how insider trading really gets caught.
SEC Rule 13f-2 and Form SHO: Short Position Reporting Explained
Congress mandated institutional short-sale disclosure in 2010. The SEC finally acted in 2023. Then came two delays and a court ruling — here's where the rule stands today, and what data actually exists right now.
Options Trading Before Merger Announcements: The Insider Signal
How informed traders use short-dated OTM calls before M&A deals, what the research shows across 1,859 takeovers, and how FINRA and the SEC catch it.
Insider Trading Blackout Periods & Trading Windows Explained
The two-layer calendar that controls when insiders can legally trade — and why the timing of a Form 4 open-market purchase changes its signal strength.
SEC Form 5 Filing Explained: The Annual Insider Catch-All
Form 5 is the annual insider filing that catches what Form 4 missed — deferred small purchases, certain gifts, and delinquent transactions. Learn what it reports, when it's due, and what a Form 5 sighting on EDGAR actually signals.
The Section 16(b) Short-Swing Profit Rule Explained
The Exchange Act's built-in clawback mechanism forces insiders to return profits from any buy-sell cycle completed within six months — no intent required. Learn who it covers, how the lowest-in/highest-out calculation works, and what 2025 case law changed.
How Does the SEC Detect Insider Trading?
A plain-English breakdown of the SEC's surveillance stack: ARTEMIS's 10 billion trade records, MIDAS, SONAR, Electronic Blue Sheets, the Consolidated Audit Trail, FINRA's 450+ annual referrals, and the 2026 Nourafchan case that shows every layer in action.
SEC Form 144 Explained: The Insider Intent-to-Sell Notice
Form 144 is filed before a sale, not after. Learn what it discloses, who must file it, why it was paper-only for decades, and how to read it alongside Form 4 as an early signal in the insider-selling chain.
Prediction Market Insider Trading: MNPI, Kalshi & Polymarket
Insider trading in prediction markets is illegal — CFTC's 2026 cases, the Eddie Murphy Rule, and where the MNPI line sits on Kalshi and Polymarket.
Tipper-Tippee Insider Trading Explained
How liability travels down a tip chain — the Dirks personal-benefit test, the Salman ruling on family gifts, and the 2026 Nourafchan case that charged 30 people across six major law firms.
Shadow Trading and Insider Trading Law: The SEC's Panuwat Case Explained
Shadow trading means using confidential company information to trade a competitor's stock. The SEC won its landmark case in 2024 — here's how the legal theory works and what the 9th Circuit appeal means.
SEC Form 3 Filing Explained: The "Day One" Insider Declaration
Form 3 is the initial beneficial ownership statement every new insider must file before their first trade. Learn what it discloses, how to read Table I vs. Table II, and why it's the essential context layer for every Form 4 that follows.
Schedule 13G Filing Explained: What Passive Ownership Really Means
Schedule 13G signals passive institutional ownership above 5%. Learn who files it, the new 2024 deadlines, what the Feb 2025 SEC guidance changed, and how to spot the 13G-to-13D conversion that moves stocks.
Schedule 13D Filing: How to Read an Activist Investor Signal
When a Schedule 13D lands on EDGAR, it means someone crossed 5% ownership with activist intent. Learn what it discloses, how the 2024 rule change made the signal faster, and what academic research says about returns.
Form 4 Transaction Codes Decoded: Signal vs. Noise
A plain-English taxonomy of every SEC Form 4 transaction code — which codes carry real directional signal (P, S) and which are compensation mechanics with no signal at all (F, A, M). Includes a practical decision tree.
The Insider Cluster Buying Signal Explained
When multiple corporate insiders independently buy the same stock within two weeks, that cluster is the highest-conviction signal in the SEC disclosure ecosystem. Here’s the academic evidence and a free screening workflow.
Section 16 Foreign Private Issuers: What the HFIAA Changed for Investors
The HFIAA ended the FPI Section 16 exemption on March 18, 2026. Foreign company insiders now file Form 4 on EDGAR — here's what changed, who's still exempt, and how to read the new filings.
How Rule 10b5-1 Trading Plans Work
The one Form 4 checkbox that separates meaningful insider sales from scheduled compensation liquidation — and what the 2023 SEC overhaul changed about how to read it.
STOCK Act Congressional Trading: A Plain-English Guide
How the STOCK Act disclosure system works, where to find every PTR, why the $200 fine has largely failed, and what six reform bills in the 119th Congress would change for investors.
How to Read Congressional Stock Trading Disclosures
What the STOCK Act Periodic Transaction Report actually shows, field by field — the 45-day lag, dollar ranges instead of exact amounts, where to find House and Senate filings, and what four structural gaps mean for using congressional trades as a signal.
How to Read SEC Form 13F: Institutional Ownership Explained
What Form 13F shows, who must file it, when it lands on EDGAR, and how to use the quarterly holdings data without being tripped up by the 45-day lag and hidden short positions.
What Insider Trading Actually Means (And Why It's Legal)
Most people hear "insider trading" and think handcuffs. The reality is far more nuanced — and far more useful to investors who know what to look for.
How to Read an SEC Form 4: A Plain-English Guide to Insider Trading Filings
Corporate insiders are required to tell you when they buy or sell shares. Learn how to actually read those filings — with real examples from Apple, NeurAxis, and Tectonic Therapeutic.