Plain-English guides to following famous investors, insiders and Congress, and what the evidence says.
What a 13F filing is, who has to file one, when they're due, what they show (and hide), and how to use them without fooling yourself.
A practical guide to copying Berkshire Hathaway's stock portfolio from its 13F filings, the catches nobody mentions, and what 10 years of backtesting says.
How members of Congress disclose stock trades under the STOCK Act, where to find them, why they arrive late, and what the research and our backtests say about copying them.
How to read insider purchases from SEC Form 4 filings, why most don't mean much, and the filters (clusters, opportunistic buyers) that research says do.