The Man Who Could Move a Stock Price With a Tweet

Money, Trust and Deception · Aug 12, 2026 · 11m · transcript

Andrew Left built a reputation as one of America's most prominent activist short sellers. Through Citron Research, his reports and social media posts could attract enormous attention and sometimes move stock prices almost immediately.

But federal prosecutors said Left was privately trading against positions he publicly encouraged other investors to take. A jury ultimately convicted him in a securities fraud case involving approximately twenty one million dollars in trading profits.

This episode examines a different kind of financial deception, one where the valuable asset was not an imaginary…