Scienter Potentia Est: The Case for the Presumption of Use Standard in Insider Trading
Fordham Journal of Corporate & Financial Law
Volume 30
Issue 1
Article 4
2025
Scienter Potentia Est: The Case for the Presumption of Use
Standard in Insider Trading
Audrey Nelson
Fordham University School of Law
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Recommended Citation
30 Fordham J. Corp. & Fin. L. 137 (2025).
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SCIENTER POTENTIA EST:
THE CASE FOR THE PRESUMPTION OF USE
SCIENTER STANDARD IN INSIDER TRADING
Audrey Nelson *
ABSTRACT
Is it possible to accidentally insider trade? The Supreme Court has
held that scienter is a necessary element of all § 10(b) and Rule 10b5 actions, 1 but the federal appeals courts are split on how the scienter
requirement applies to insider trading cases. 2 In a non-insidertrading § 10(b) case, the Supreme Court stated that § 10(b) scienter
requires intentional misconduct. 3 Although the Supreme Court has
not heard a case specifically about the scienter element in the context
of insider trading, those who support a use requirement claim that
the § 10(b) scienter element requires the plaintiff to show that the
insider used the MNPI in the decision to trade. 4
Those who support a possession standard reason that possession of
MNPI creates an unfair informational advantage, which is sufficient
reason to prohibit an insider from trading. 5 They also argue that it is
J.D. Candidate, Fordham University School of Law, 2025; B.S., Colorado College,
2020. I would like to thank Professor Caroline Gentile for her expertise and
indispensable guidance through the research and writing process. I would like to thank
the staff of the Fordham Journal of Corporate & Financial Law for their support and
feedback. I am also grateful to my family and friends for their encouragement and care.
1. Ernst & Ernst v. Hochfelder, 425 U.S. 185, 201-02 (1976) (holding that § 10(b)
requires an element of scienter); Aaron v. SEC, 446 U.S. 680, 691 (1980) (clarifying
that scienter is an element in both public and private 10b-5 cases).
2. Donald C. Langevoort, What Were They Thinking? State of Mind Puzzles in
Insider Trading 3 (Geo. L. Fac. Pub. and Other Works, Paper No. 2496, 2023).
3. Id.
4. United States v. Smith, 155 F.3d 1051, 1067-68 (9th Cir. 1998); Hochfelder,
425 U.S. at 197.
5. United States v. Teicher, 987 F.2d 112, 120-21 (2d Cir. 1993).
*
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OF CORPORATE & FINANCIAL LAW
[Vol. XXX
impractical to require a plaintiff to prove a defendant actually used
the MNPI in the decision to trade. 6
This Note argues that possession of MNPI should create a rebuttable
presumption of use for the purposes of insider trading liability under
the § 10(b) and Rule 10b-5 scienter requirement. This standard best
balances the Supreme Court’s clarification that fraud under 10(b)
includes intentional conduct 7 with the practicality of the knowing
possession standard.
INTRODUCTION...................................................................................... 139
PART I ................................................................................................... 140
A. Scienter is an element of insider trading ................................ 140
B. The Possession/Use Debate ................................................... 144
C. General Background on the Securities Exchange Act of
1934........................................................................................ 146
PART II.................................................................................................. 146
A. Review of Caselaw on Scienter ............................................. 146
1. Caselaw Supporting the Possession Standard.................. 147
i. 2nd Circuit ................................................................. 147
ii. 1st Circuit .................................................................. 148
2. Caselaw Supporting the Use Standard ............................. 149
i. 9th Circuit .................................................................. 149
3. Caselaw Supporting Standards Between Possession
and Use ............................................................................ 151
i. 11th Circuit ................................................................ 151
ii. 7th Circuit .................................................................. 153
B. The 1984 Insider Trading Sanctions Act’s Support of the
Possession Standard ............................................................... 154
C. The SEC’s Rulemaking in Support of the Possession
Standard ................................................................................. 155
D. Diverging Interpretations of the 2021 Insider Trading
Prohibition Act ....................................................................... 156
PART III ................................................................................................ 158
A. The Best Standard is a Rebuttable Presumption of Use
When in Possession of MNPI ................................................ 158
B. The Supreme Court Should Take the Next Opportunity to
Clarify the Scienter Standard ................................................. 162
6. See Andrew Verstein, Mixed Motives Insider Trading, 106 IOWA L. REV. 1253,
1257 (2021).
7. Ernst & Ernst v. Hochfelder, 425 U.S. 185, 201-02 (1976) (holding that § 10(b)
requires an element of scienter); Aaron v. SEC, 446 U.S. 680, 691 (1980) (clarifying
that scienter is an element in both public and private 10b-5 cases).
2025]
SCIENTER POTENTIA EST
139
CONCLUSION ......................................................................................... 163
INTRODUCTION
If material nonpublic information (“MNPI”) does not factor into
someone’s decision to trade, is that person engaging in insider trading?
For example, a company’s employee owns stock in the company. She
plans to sell her stock at the end of the week to make a down payment
on a new home, but she does not have a written trading plan. During that
week, she learns nonpublic information that the company is about to be
bought by a competitor. Although she appreciates the higher selling
price, the merger in no way factored into her decision to sell her shares
on Friday. She sells her stock as planned. Should the employee be liable
for insider trading?
Whether this employee is liable for insider trading depends on the
circuit she is in. The Supreme Court has made it clear that scienter is a
required element of insider trading, 8 but the circuit courts disagree on
the l (...truncated)