How 13F filings work, and how to follow the great investors without fooling yourself.
What the SEC’s flagship hedge-fund disclosure actually tells you — and the four things it deliberately leaves out.
9 min read
Not all "holdings" filings are equal. Knowing which form you’re reading changes how much the signal is worth.
7 min read
A $600B 13F sounds like the ultimate buy list. For a multi-strategy quant, it’s mostly market plumbing.
7 min read
Following the smart money is a research edge, not an autopilot. Four reasons the naive copy-trade underperforms.
8 min read
The word predates every hedge-fund tracker. It came from a 1984 Buffett lecture — and the argument still holds.
7 min read
Four times a year, the great investors have to show their hand. Here’s exactly when in 2026.
5 min read
The number of positions in a 13F is the fastest tell for whether it carries any signal at all.
6 min read