Crown image Columbia Law School
Home About Contact Subscribe RSS Email Twitter
Previous Next

  • John C. Coffee, Jr.: Event Contracts and Prediction Markets Comment bubble 3 By John C. Coffee, Jr.
  • Leveraging Information Forcing in Good Faith By Hillary Sale
  • The Dark Side of Safe Harbors Comment bubble 2 By Susan C. Morse
  • John C. Coffee, Jr. – Mass Torts and Corporate Strategies: What Will the Courts Allow? By John C. Coffee, Jr.
  • Compliance’s Next Challenge: Polarization By Miriam H. Baer
  • Will the Common Good Guys Come to the Shootout in SEC v. Jarkesy? And Why It Matters By Eric W. Orts
  • Climate Disclosure Line-Drawing and Securities Regulation By Virginia Harper Ho
  • Board Committee Charters and ESG Accountability By Lisa M. Fairfax
Editor-At-Large Reynolds Holding

The CLS Blue Lion logo Sky Blog

Crown image

Columbia Law School's Blog on Corporations and the Capital Markets

Editorial Board John C. Coffee, Jr. Edward F. Greene Kathryn Judge

Menu

Skip to content
  • Our Contributors
  • Corporate Governance
  • Finance & Economics
  • M & A
  • Securities Regulation
  • Dodd-Frank
  • International Developments
  • Library & Archives

Rule 10b-5

Why Traditional Damage Calculations May Underestimate Securities Fraud Harm

By Michael McDonald November 21, 2025 by renholding

If you practice securities litigation, you know the drill: When a stock’s value drops significantly after disclosure of adverse information, calculating damages typically focuses on the price decline itself, adjusted for market movements. In a new paper, I suggest this …

Do Stricter Insider Selling Policies Impede Market Efficiency and Hurt Innocent Players?

By Pengfei Ye, Qingsheng Zeng and Cheng Zhang October 28, 2025 by renholding

Corporate insiders’ opportunistic trading – particularly selling their firms’ stocks before bad news – erodes public trust, reduces market participation, and exacerbates the agency problem that occurs when the interests of insiders and the company conflict. Yet, regulators have been …

The Perils of Excessive Mandatory Disclosure

By Hing Nin Kwok October 3, 2025 by renholding

Disclosure requirements can serve legitimate public purposes, but a blanket mandate risks negative economic ramifications. In a new paper, I examine how excessive mandatory disclosure could backfire, what makes an appropriate rule, and the l challenges of  evaluating policies on …

Paul Weiss Discusses Second Circuit Limit on Insider Trading Liability for Prime Brokers

By Andrew Ehrlich, Dan Kramer, Lorin Reisner, Daniel Sinnreich and Thomas Bounds October 2, 2025 by renholding

On September 16, 2025, the U.S. Court of Appeals for the Second Circuit affirmed the dismissal of insider trading claims against Morgan Stanley and Goldman Sachs (the “Banks”) following the March 2021 collapse of Archegos Capital Management. Plaintiffs—investors in seven …

Supreme Court’s Recent Interpretation of Wire Fraud Confirms Confidential Government Information Is Property

By Donna M. Nagy June 11, 2025 by renholding

For nearly 40 years, regardless of whether confidential information belonged to a governmental entity or a private-sector business, its misappropriation could be prosecuted as a property crime. Lower federal courts relied on Carpenter v. United States,[1] a well-known …

Securities Regulation and Administrative Law in the Roberts Court

By David Zaring May 19, 2025 by renholding

In a new essay, I compare a judicial revolution that is happening with one that is not. Both the change and the status quo are being managed by the current Supreme Court. , When it comes to administrative law, the …

Gibson Dunn Offers Securities Litigation Update for 2024

By Craig Varnen, Monica Loseman, Brian Lutz, Jefferson Bell and Chase Weidner March 5, 2025 by renholding

In this update:

  • We report on orders from the Supreme Court that dismissed two securities-related cases from the Court’s merits docket, leaving unresolved questions about pleading standards and the nature of misstatements under the PSLRA. We also examine one potential
…

Where Do Corporate Insiders Trade?

By Alexander Hübbert and Lars L. Nordén October 29, 2024 by renholding

The venue for stock trading is important. Exchanges provide high immediacy and transparency, while dark markets are slower and more opaque.[1] Traders generally prefer exchanges when they want to capitalize on information before it becomes known but value dark markets …

Gibson Dunn Offers Securities Litigation 2024 Mid-Year Update

By Craig Varnen, Monica Loseman, Brian Lutz, Jefferson Bell and Chase Weidner September 18, 2024 by renholding

This update provides an overview of the major developments in federal and state securities litigation since our Securities Litigation 2023 Year-End Update. A recent NERA Economic Consulting (NERA) study provides an overview of recent developments in filings. This section …

Cohen Milstein Discusses Two U.S. Supreme Court Cases that May Increase Hurdles for Securities Fraud Plaintiffs

By Laura H. Posner and Alexandra Gray September 12, 2024 by renholding

In November, the U.S. Supreme Court will hear two cases from the Ninth Circuit Court of Appeals that will implicate the ability of investors to bring securities fraud claims. The most worrisome – NVIDIA Corp. v. E. Ohman J:or Fonder …

Just Friends? Managers’ Connections to Judges

By Sterling Huang, Sugata Roychowdhury, Ewa Sletten and Yanping Xu July 25, 2024 by renholding

The Code of Conduct for United States Judges prohibits judges from allowing personal relationships, including social connections with parties or attorneys involved in a case, to influence the judges’ conduct. However, the disclosure of such social conflicts, as well as …

Undue Limitations in the Section 10(b) Purchaser-Seller Requirement

By Marc I. Steinberg and Antonio Partida May 21, 2024 by renholding

In a forthcoming article, we address recent restrictions and diverging approaches among the federal courts to the purchaser-seller requirement for a private action under Section 10(b) of the Securities Exchange Act and Rule 10b-5. The “Purchaser-Seller Rule,” commonly …

Skadden Discusses Scotus Ruling That Omissions Not Actionable Under Section 10(b) of Exchange Act

By Jay B. Kasner, Scott D. Musoff, Susan L. Saltzstein and Michael S. Hines April 18, 2024 by renholding

On April 12, 2024, the Supreme Court unanimously reversed and vacated the Second Circuit’s decision in Macquarie Infrastructure Corporation v. Moab Partners, L.P. Justice Sonia Sotomayor delivered the opinion for the Court. The issue presented was whether the failure to …

Paul Weiss Discusses Verdict in SEC “Shadow Trading” Case

By Andrew J. Ehrlich, Gregory F. Laufer, Jessica S. Carey, Richard C. Tarlowe and Udi Grofman April 15, 2024 by renholding

On Friday, April 5, 2024, a jury in the Northern District of California found that the SEC had established that Defendant Matthew Panuwat, a former senior director of business development at biopharmaceutical firm Medivation, was liable under a civil misappropriation …

Are Securities Class Actions Appropriate to Address Secondary-Trading Crypto Fraud?

By Menesh S. Patel April 2, 2024 by renholding

Traders in the United States now routinely trade hundreds of crypto assets in secondary crypto markets, and the pool of tradable assets is growing. Through these transactions, traders have seen financial gains and losses, which at times have been substantial. …

U.S. Supreme Court Considers Whether Pure Omissions Can Support Section 10(b) Liability

By Sarah Eichenberger and Jonathan Rotenberg February 12, 2024 by renholding

On January 16, 2024, the U.S. Supreme Court held oral argument on a question that could have significant consequences for securities litigants: whether a failure to disclose information under Item 303 of Regulation S-K is, standing alone, an actionable omission …

Debevoise Discusses Supreme Court Case on Whether a Private Right of Action Exists for Deficient MD&A

By Matthew Kaplan, Maeve O’Connor, Jonathan Tuttle, Benjamin Pedersen and Anna Moody October 23, 2023 by renholding

The Supreme Court has agreed to hear an appeal relating to whether there is a private right of action for omissions from the disclosures required by Item 303 of Regulation S-K (i.e., Management’s Discussion and Analysis of Financial Condition and …

Why Prosecuting Executives for Securities Fraud Is So Difficult

By James J. Park October 12, 2023 by renholding

In a new essay, I examine public company wrongdoing by focusing on securities fraud.

In general, there are two main reasons why companies commit wrongful acts. The first is that managers have incentives to further their own interests. They may …

How Regulation of Share Buybacks and Insider Trading Compare in the U.S. and Europe

By Lance Ang April 21, 2023 by renholding

Share buybacks have returned with a vengeance following the COVID-19 pandemic.[1] The average proportion of buybacks out of aggregate shareholder payouts in 2019-2021 was higher than the historical average during 2005-2019 in the U.S. and Europe.[2] These developments …

Cooley Discusses the Risk of Liability from Sustainability Reports

By Cydney Posner April 14, 2023 by renholding

In April of last year, as described in this press release, the SEC filed a complaint against Vale S.A., a publicly traded (NYSE) Brazilian mining company and one of the world’s largest iron ore producers, charging that it made “false …

1 2 3 Next »

TheFilter

Description

Each business day, our team sifts through blog posts, news stories, and other sources to keep up-to-date on relevant recent developments. The following links will take you to our recommended selections. To see the sources we follow click Filter Sources.

Filter Sources
New York Times
States Sue to Block Paramount-Warner
July 13, 2026
The Governance Beat
Pharma Firms Ready to Go Semi-Annual
July 13, 2026
Financial Times
Suit Over Tylenol-Autism Link Revived
July 13, 2026
D&O Diary
AI-Related Securities Suits Evolving
July 13, 2026
Sidley Enhanced Scrutiny
Delaware Chancery Draws a Line on Release Conditions in M&A
July 13, 2026
Bloomberg
Trump Embraces Australian Retirement System Backed by Larry Fink
July 12, 2026
Delaware Business Litigation Report
Delaware Supreme Court Clarifies Distinction Between Void and Voidable
July 12, 2026
Freshfields' A Fresh Take
Federal Regulators Propose New Rules for Payment Stablecoin Issuers
July 12, 2026
Financial Times
Big Tech to Face Big EU Fines for Consumer Protection Failures
July 12, 2026
Business Law Prof Blog
How Comment Letters Stack Up on SEC Semi-Annual Reporting Rule
July 12, 2026
Wall Street Journal
Netflix Exploring Live TV, Bundles
July 9, 2026
Bloomberg
Goldman Bans Staff From Prediction-Market Bets on Finance, War
July 9, 2026
Cleary Securities Watch
SEC Issues 2026 Rulemaking Agenda
July 9, 2026
Securities Regulation and Corporate Governance Monitor
SEC Guidance on Activism, Tender Offers, Proxy Matters, Crowdfunding
July 9, 2026
Business Law Prof Blog
The Latest on Reincorporations
July 9, 2026
Bloomberg
Supreme Court’s Originalism Is Dead
July 8, 2026
Wall Street Journal
Why Smucker’s Bet on Twinkie Flopped
July 8, 2026
Delaware Business Litigation Report
Chancery Applies “Heightened” Presumption of Director Independence
July 8, 2026
New York Times
Lawyer William D. Zabel Dies
July 8, 2026
D&O Diary
New Lawsuit Suggests Evolution in Cross-Border Securities Fraud
July 8, 2026
Wall Street Journal
U.S. Revokes Iranian Oil-Sales Waiver
July 7, 2026
Bloomberg
Fed Proposes Changes to Anti-Money Laundering Rules for Banks
July 7, 2026
D&O Diary
Private Credit Firm Sued Over Excessive Payment-in-Kind Fee
July 7, 2026
Sidley Enhanced Scrutiny
Chancery Rules Indemnification Can Fix Bad Purchase-Price Adjustment
July 7, 2026
Delaware Corporate & Commercial Litigation Blog
Delaware Chancery Clarifies Implied Covenant of Good Faith and Fair Dealing
July 7, 2026
Wall Street Journal
Banks Mull Deal to Shake Up Payments
July 6, 2026
Bloomberg
Toyota to Make Truck in Texas Not Mexico
July 6, 2026
Freshfields' A Fresh Take
SEC Expanding Regulatory Perimeter
July 6, 2026
Financial Times
Microsoft to Axe 4,800 Jobs
July 6, 2026
Deal Lawyers.com
Delaware Supremes Say Fraudulent-Reps Reliance OK Despite Diligence Gaps
July 6, 2026
Reuters
UK Budget Airline to Accept Takeover
July 5, 2026
Wall Street Journal
Why Billionaire Wants to Pay More Tax
July 5, 2026
Cleary Securities Watch
SEC Updates Debt Tender-Offer Rules
July 5, 2026
D&O Diary
Solar Panel Company Hit with Tariff-Related Securities Suit
July 5, 2026
Delaware Corporate & Commercial Litigation Blog
Delaware Chancery Harmonizes Conflicting Forum Selection Clauses
July 5, 2026
Reuters
US to End North American Trade Deal
July 1, 2026
Wall Street Journal
Scandals Shake Up McKinsey Board
July 1, 2026
Bloomberg
Exxon to Change Name Post-Redomicile
July 1, 2026
Financial Times
White House Lifts Anthropic Ban
July 1, 2026
D&O Diary
Federal Contractors Claim Fuzzy DEI Requirements Put Them at Risk
July 1, 2026
Delaware Corporate & Commercial Litigation Blog
The Key Delaware Corporate and Commercial Decisions of 2026 So Far
July 1, 2026
Bloomberg
TikTok Finalizes Addiction-Suit Deal
June 30, 2026
Cleary M&A Watch
Shareholder Activism at 2026 Midpoint
June 30, 2026
New York Times
AOL, Vimeo, Other Oldies Live Again
June 30, 2026
Financial Times
New “Claude” Seeks Pharma Revenue
June 30, 2026
D&O Diary
Securities Suits Up in Year’s First Half
June 30, 2026
Wall Street Journal
Remote Work Shrinks New-Grad Jobs
June 29, 2026
Dealbook
Comcast to Spin Off NBCUniversal
June 29, 2026
Financial Times
Scotus Rules Fed Governor Can Stay
June 29, 2026
D&O Diary
FTC, Then Shareholders, Sue Zillow
June 29, 2026
Yahoo Finance
SEC Probing PE Continuation Funds
June 29, 2026
Wall Street Journal
FIFA Ban a Stadium Sponsor Boon
June 28, 2026
Bloomberg
Flawed Robotaxis Making Headway
June 28, 2026
New York Times
OpenAI IPO May Wait Until Next Year
June 28, 2026
Cleary Securities Watch
Update on 2026 Shareholder Activism
June 28, 2026
Sidley Enhanced Scrutiny
Delaware Chancery Clarifies Limits of Delaware Notice Pleading
June 28, 2026
D&O Diary
Delaware Court: Bump-Up Clause Bars Shareholder-Suit D&O Coverage
June 28, 2026
D&O Diary
AI Governance Is a Fiduciary Duty
June 25, 2026
Justice Department
SPAC Ex-CEO Sentenced to 3 Years
June 25, 2026
Bloomberg
SEC Joins Prediction Market Fray
June 25, 2026
Deal Lawyers.com
Texas Biz Court Adresses “Affiliate” Under Drag-Along Rights Provision
June 25, 2026
Business Law Prof Blog
Nevada Starts Business Court Pilot
June 25, 2026
Bloomberg
Anthropic Accuses Alibaba of “illicitly” Accessing AI Models
June 24, 2026
Financial Times
Bitcoin Hits 20-Month Low
June 24, 2026
Cleary Securities Watch
CFTC Proposes New Rule on Oversight of Prediction Markets
June 24, 2026
D&O Diary
Case Shows How Pre-IPO Share Repurchases Create D&O Risks
June 24, 2026
Deal Lawyers.com
SEC Issues New CFI on Rights Listings in Business Combinations
June 24, 2026
Wall Street Journal
CEO Paydays Soar Past $200 Million
June 23, 2026
Bloomberg
Banks Capping Private Credit Exits
June 23, 2026
The Governance Beat
Audit-Committee Chair Top 10 Wishes
June 23, 2026
Financial Times
Paul Weiss Snags Bankruptcy Star
June 23, 2026
D&O Diary
Derivative Suit Alleges Uber is a “Serial Compliance Offender”
June 23, 2026
Wall Street Journal
SpaceX Readies Bond Market Debut
June 22, 2026
Bloomberg
Former Fed Chair Greenspan Dies
June 22, 2026
The Governance Beat
PwC Report Says Effective Governance Requires Boards and Management
June 22, 2026
D&O Diary
Texas Anti-ESG Effort Targets ISS
June 22, 2026
Deal Lawyers.com
U.S. Court Allows Shareholder Claims Over Regulatory Approval Disclosure
June 22, 2026
Reuters
Trump: Anthropic No Security Threat
June 21, 2026
Wall Street Journal
Hollywood Hits Pre-Pandemic Highs
June 21, 2026
Financial Times
Wars Drawing VCs to Defense Tech
June 21, 2026
D&O Diary
SEC’s Proposal to Ditch Quarterly Reporting Draws Heated Comments
June 21, 2026
Business Law Prof Blog
Delaware Chancery Issues First Decision Interpreting DGCL Section 144
June 21, 2026
Reuters
Startups Explore Orbital AI Data Centers
June 18, 2026
Bloomberg
AI Learns to Spot Toxic Bosses
June 18, 2026
Wall Street Journal
More Investors Seek Private Credit Exit
June 18, 2026
Financial Times
JPMorgan Cuts Claude Access in Asia
June 18, 2026
Deal Lawyers.com
Chancery Finds Selling Shareholders Didn’t Breach Right of First Refusal
June 18, 2026
Wall Street Journal
John Paulson Wins Puerto Rico Case
June 17, 2026
New York Times
Musk May Merge SpaceX, Tesla Next
June 17, 2026
The Governance Beat
Can SEC Act With Two Commissioners?
June 17, 2026
Financial Times
Trump Delays Jay Clayton Confirmation
June 17, 2026
Sidley Enhanced Scrutiny
Chancery Dumps Stockholder Claims as Derivative, Unripe, and Untimely
June 17, 2026
Bloomberg
Kalshi Aims to Expand Perpetual Futures
June 16, 2026
New York Times
SpaceX to Buy AI Startup for $60 Bln
June 16, 2026
D&O Diary
Securities Suit Over AI Hits Microsoft
June 16, 2026
Delaware Corporate & Commercial Litigation Blog
Chancery Offers Guidance on Enforcing, Changing Scheduling Orders
June 16, 2026
Business Law Prof Blog
The Latest in State Reincorporations
June 16, 2026
Wall Street Journal
Paramount Deal OK Stuns DOJ Staff
June 15, 2026
Delaware Business Litigation Report
Delaware Supreme Court Addresses Implied Covenant in Earnout Dispute
June 15, 2026
Freshfields' A Fresh Take
Climate-Disclosure Rescission Presages Fate of Other Disclosure Rules
June 15, 2026
D&O Diary
Bankruptcy and Securities Law Tangle in Class-Action Dismissal
June 15, 2026
Delaware Corporate & Commercial Litigation Blog
Chancery Clarifies Equitable Role in Setting Post-Judgment Interest
June 15, 2026
Bloomberg
Trump Taps New Top Wall Street Cop
June 14, 2026
D&O Diary
Private Credit Litigation Is Growing
June 14, 2026
Armstrong Teasdale Report
How SEC Chair’s First Year Has Gone
June 14, 2026
Bain Report
Private Equity Turnaround Deferred
June 14, 2026
Business Law Prof Blog
Buy Tesla Shares to Get SpaceX
June 14, 2026
Blog Roll Header
  • Business Law Prof Blog
  • Corporate & Securities Law Blog
  • DealLawyers
  • Delaware Corporate and Commercial Litigation Blog
  • Gibson Dunn Securities Regulation and Corporate Governance Monitor
  • Harvard Law School Forum on Corporate Governance
  • How Appealing
  • PubCo @ Cooley
  • Securities Docket
  • Sidley Enhanced Scrutiny Blog
  • The D&O Diary
  • Truth on the Market
  • White Collar Crime Prof Blog
The Blue Sky Blog is Sponsored by Columbia Law School's Center on Corporate Governance.
Blwag 100 badge
Crown image Columbia Law School
Home About Contact Subscribe or Manage Your Subscription RSS Email Twitter
© Copyright 2026, The Trustees of Columbia University in the City of New York.