---
id: "entity-john-bogle"
type: "entity"
entityType: "person"
canonicalName: "John Bogle"
aliases: ["Jack Bogle"]
source_timestamps: ["00:10:30"]
tags: ["investor", "index-funds"]
related: ["entity-vanguard", "claim-diversification-is-for-ignorance"]
sources: ["saylor"]
sourceVaultSlug: "saylor-bitcoin-digital-capital-cardone-2026Jun25"
originDay: 1
---
# John Bogle

## Profile

Founder of [[entity-vanguard]] and pioneer of index investing.

## Role in this source

[[entity-michael-saylor]] names Bogle as the architect of the diversification strategy that he believes is suboptimal for informed investors.

Bogle's framework — broad, low-cost market diversification — is the explicit target of:

- [[claim-diversification-is-for-ignorance]] ("diversification is selling the winner to buy the losers").
- [[contrarian-diversification-is-destructive]] (the inversion of MPT).
- [[quote-diversification-losers]] (the verbatim quote).

Bogle's position represents the academic / institutional consensus Saylor argues against.