hedge funds spend $50M a year building a strategy they're legally required to publish every quarter
that's not an irony - it's an opening
13F filings:
public, free, every position they held at quarter-end
take two filings three months apart, diff the positions
you see exactly what they bought and when they entered
now backtest those entry conditions against price data from same window
what signal was live when they entered? volatility spike? momentum break? volume anomaly?
you're not modeling the market. you're reading a solved exam
renaissance, citadel, two sigma - required by law to publish this every 90 days
most retail traders have never opened a 13F in their life
people who figured this out aren't smarter. they just stopped asking "what should i buy?" and started asking "what did they buy, and why then?"
Bookmark this knowledge and learn it ASAP
answer sheet has been public since 1978. nobody told retail to open it