ANDREW LEFT

Founded Citron Research in 2001. It was one of the first "activist short" research outlets — publishing free public reports alleging fraud, misrepresentation, or overvaluation at publicly traded companies.

If Left published a report on your stock, it was going down.

His track record on fraud detection is genuinely impressive. He was early on Valeant Pharmaceuticals (which collapsed 90%+), Luckin Coffee (which admitted fabricating $310 million in sales), Evergrande (before the Chinese real estate collapse), and numerous Chinese reverse merger frauds in the 2010s.

He also got it wrong plenty of times. He shorted Tesla, Shopify, and Nvidia at various points — all of which went on to become massive winners.

Short selling is a game where being right 60% of the time is excellent, because the one that goes against you can be unlimited.

Citron Research was a one-man research outfit. No fund, no investors (for most of its history).

Left would identify targets, write a research report, publish it on Twitter and the Citron website, and trade his own money on the thesis. The reports were punchy, accessible, and designed to go viral.

In 2023, Left was charged by the SEC with fraud — allegedly front-running his own reports by taking positions, publishing the report to move the stock, and then quickly reversing his position for profit. He settled the charges.

After the GameStop disaster, Left announced Citron would stop publishing short research and pivot to long-only investing.

Left is a narrative short seller. He doesn't use complex quantitative models.

He reads financial statements, talks to industry sources, and identifies red flags — then writes a story that explains why a company is overvalued or fraudulent. The research is designed to be understood by regular people, not just analysts.

His edge was distribution. By publishing free research on social media, he could move stocks with a single tweet.

This amplified his trading profits but also made him a public target.

His long-only pivot post-GameStop suggests he recognized that the short-selling landscape had fundamentally changed. When Reddit can organize a squeeze against you, the asymmetry of short selling becomes even more punishing.

Valeant Pharmaceuticals. Left published a Citron report in 2015 calling Valeant a "pharmaceutical Enron." The stock was at $250.

Over the next two years, it collapsed to under $10 as the company's drug pricing practices, pharmacy relationships, and accounting were exposed. Citron's report was among the first to ring the alarm.

Left reportedly made millions on the trade.

GameStop. In January 2021, Left published a video calling GameStop stock "back to $20 fast" when it was trading around $40.

The r/WallStreetBets subreddit organized a massive short squeeze. GameStop went to $483.

Left was forced to cover at enormous losses and became the face of "Wall Street vs. the people." He closed Citron's short research division permanently.

Left believes markets are fundamentally efficient in the long run but can sustain frauds and overvaluations for years. His job — as he saw it — was to accelerate the inevitable correction by publishing research that exposed the truth.

He also believes in transparency. Publishing research freely and publicly was unusual in the short-selling world, where most operate in secrecy.

Left argued that sunlight was the best disinfectant.

Post-GameStop, he seems to believe the short-selling playbook is broken. Social media gave retail investors the ability to organize against short sellers, fundamentally changing the risk-reward calculus.

Married with children in Los Angeles. His family life is mostly private.

His public identity is almost entirely Citron Research and his Twitter presence.

Attended Northeastern University. No advanced degree.

He's entirely self-taught in financial analysis. His background is in retail before pivoting to financial research and trading.

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