this Stanford paper is f*cking insane they just compressed the entire hedge fund playbook into a 17-page pdf. Stanford put out the complete Hidden Markov Model framework that quants at firms like Jane Street and Two Sigma are known to run, and released it for free. the crazy part is this isn't some watered-down summary, it's the actual mechanics behind models these desks keep locked up internally. most people assume this stuff never leaves institutional walls. this one hands you the framework directly, no gatekeeping. bookmark it and read before someone takes it down.