• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
FinanceTerm Sheet

What is insider trading?

By
Roger Parloff
Roger Parloff
Down Arrow Button Icon
By
Roger Parloff
Roger Parloff
Down Arrow Button Icon
August 15, 2013, 11:13 AM ET

A few months ago a hedge fund executive commented casually to Fortune editor Andy Serwer that he wished the U.S. Securities and Exchange Commission would issue guidelines sharply defining exactly what insider trading was, and what it wasn’t. People in his industry wanted to play by the rules, he claimed, but they just weren’t certain what those were. Serwer asked me, as Fortune’s legal correspondent, to look into this situation.

I was skeptical. Among the scores of criminal insider trading cases brought by U.S. Attorney Preet Bharara in recent years, all the indictments I’d seen — including the ones against Steven A. Cohen’s SAC Capital Advisors and eight of its employees — alleged crystal clear wrongdoing. Even the stock analysts and hedge fund managers I began interviewing agreed that those criminal cases alleged conduct well over the line.

But they also explained the gray areas in the law they confront every day — areas that can trigger S.E.C. or Financial Industry Regulatory Authority (FINRA) inquiries and reviews which are not only expensive to defend but terrifying, in that, for a fund, mere suspicion of wrongdoing can trigger stampedes of investor withdrawals, imperiling survival. It also soon became apparent why it was so hard for the government to make a case against Steven Cohen himself, notwithstanding the guilty pleas of six of the portfolio managers and analysts who worked for him. Though Cohen may have seen emails from these subordinates that look like flaming red flags to you and me — and, indeed, to U.S. Attorney Bharara — those same emails might look innocuous or even routine to practitioners of what I came to see as “The Gray Art of Not-Quite Insider Trading.”

The resulting article with that title is the cover story of Fortune’s September 2, 2013, issue. As I explain there, it’s “about the layers of gray that wash over the world in which hedge fund portfolio managers and stock analysts operate, a world of which the general public knows little. It’s about what insider trading is, why it’s so hard to define, why prosecutors and regulators like it that way, and why analysts don’t.” We hope you enjoy it.

About the Author
By Roger Parloff
See full bioRight Arrow Button Icon

Latest in Finance

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

Man wearing a suit and tie and glasses
Big TechTech
Microsoft, Meta, and Google just announced billions more in AI spending. Only Google convinced investors it’s paying off
By Amanda GerutApril 29, 2026
6 hours ago
A man in a suit and tie
InvestingMeta
Meta just bumped its 2026 capex forecast up to as much as $145 billion for the AI boom—and investors flinched
By Amanda GerutApril 29, 2026
8 hours ago
teri
BankingBanks
Exclusive: America’s largest Black-owned bank launches podcast with mission to unlock hidden shame holding back generational wealth
By Nick LichtenbergApril 29, 2026
8 hours ago
A broken grounded plane sits on the tarmac surrounded by machinery
North AmericaAirports
Trackers will be added to emergency vehicles at LaGuardia following deadly March collision
By Bruce Shipkowski and The Associated PressApril 29, 2026
11 hours ago
People wait in long lines at the airport.
PoliticsWhite House
More airport disruptions may be coming as White House warns pay for TSA workers will ‘soon run out’
By Lisa Mascaro and The Associated PressApril 29, 2026
11 hours ago
trump
Energywind energy
Trump spent nearly $2 billion of taxpayer money to undo wind projects already underway. Dems demand answers
By Jennifer McDermott and The Associated PressApril 29, 2026
11 hours ago

Most Popular

Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
Success
Apple cofounder Ronald Wayne—whose stake would be worth up to $400 billion had he not sold it in 1976—says that at 91, he has no regrets
By Preston ForeApril 27, 2026
3 days ago
‘Take the money and run’: Johns Hopkins economist Steve Hanke on why the UAE quit OPEC
Energy
‘Take the money and run’: Johns Hopkins economist Steve Hanke on why the UAE quit OPEC
By Shawn TullyApril 29, 2026
24 hours ago
‘The cost of compute is far beyond the costs of the employees’: Nvidia executive says right now AI is more expensive than paying human workers
AI
‘The cost of compute is far beyond the costs of the employees’: Nvidia executive says right now AI is more expensive than paying human workers
By Sasha RogelbergApril 28, 2026
2 days ago
Jamie Dimon gets candid about national debt: ‘There will be a bond crisis, and then we’ll have to deal with it’
Economy
Jamie Dimon gets candid about national debt: ‘There will be a bond crisis, and then we’ll have to deal with it’
By Eleanor PringleApril 29, 2026
20 hours ago
‘They left me no choice’: Powell isn’t going anywhere—blocking Trump from another Fed appointee
Banking
‘They left me no choice’: Powell isn’t going anywhere—blocking Trump from another Fed appointee
By Eva RoytburgApril 29, 2026
12 hours ago
More than two-thirds of U.S. schools say they’re unable to afford the cost of student free lunch—and MAHA’s dietary guidelines may make it worse
Economy
More than two-thirds of U.S. schools say they’re unable to afford the cost of student free lunch—and MAHA’s dietary guidelines may make it worse
By Sasha RogelbergApril 29, 2026
22 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.