Can you actually copy Warren Buffett?

The 45-day delay problem

Hedge funds file 13Fs 45 days after the quarter ends. By the time you read on HoldLens that "Buffett bought Apple at $150," Apple is probably trading at $175 — and Buffett has had 6+ weeks to add, trim, or exit. You are always trading on stale data.

The selection bias problem

13Fs only show long US equities. Buffett's full position might include: a put option, a short hedge, a corporate bond, a foreign stock, or a private equity stake. You're seeing maybe 60% of the picture for a manager like Berkshire — far less for hedge fund managers who use derivatives.

The position-sizing problem

Buffett owning 0.5% of Apple is a different risk than YOU owning 0.5% of your own portfolio in Apple. He has $300B+ in cash and other assets. You don't. A position that's "safe" for him can be career-ending for you.

So what IS HoldLens for?

• Idea generation: "Five managers I respect just bought X — let me research X."
• Validation: "I'm thinking of buying X — does any pro hold it? Why?"
• Theme detection: When 5+ value investors rotate into the same sector at once, that's a thesis, not a coincidence.
• Manager study: Read what the great investors have actually bought over decades. The best education in investing is studying real portfolios.

Bottom line

HoldLens is a research tool, not a copy-trading service. We never tell you what to buy. We show you what the smartest minds in the market are doing — so you can do your own research smarter.

Not investment advice. See methodology.