Discussion on "Diff two 13F filings by CUSIP (and check an AI's "what did Berkshire buy?" answer)"

Daniel Oliveira · 2026-10-08T02:28:19.143Z

A common question to put to an AI assistant is "what did this fund buy last quarter?", and the answer comes from Form 13F-HR. I build Equibles, which has an MCP server that answers it. In this post I

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Diff two 13F filings by CUSIP (and check an AI's "what did Berkshire buy?" answer)

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