Michael Burry of 'The Big Short' is now a full-time writer. Here's why he and other investors put pen to paper.

"It's a return to Burry's roots. Long before he predicted and profited from the collapse of the mid-2000s US housing bubble, he ran a value-investing blog in his off hours as a medical student. Burry is one of many investors to embrace writing as a core part of their process. "I do not speak well, but writing and analysis go hand-in-hand," Burry told Business Insider via email. "I have always read a lot, which has fed my love of writing.""

"He underlined how writing supports his investing during a university lecture in 1991. "Some of the things I think I think, I find don't make any sense when I start trying to write them down and explain them to people," Buffett said. He added that everyone should be able to explain why they're taking a job or making an investment, and "if it can't stand applying pencil to paper, you'd better think it through some more.""

Michael Burry is shuttering his hedge fund to focus on a Substack called "Cassandra Unchained" aimed at calling out AI mania and companies such as Nvidia and OpenAI. The move returns him to earlier roots when he ran a value-investing blog while a medical student. Several prominent investors publish long-form analysis as part of their investment process, including Warren Buffett, Ray Dalio, and Howard Marks. Buffett previously closed a partnership in 1969 for lack of bargains and plans to continue annual shareholder letters. Buffett also argued that attempting to put thoughts on paper exposes flaws and that investments should withstand applying pencil to paper.

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