MINDSETdays80% confidence

Take the L Fast

Kill a failing bet the moment you know, give the money back, and feel proud you acted quickly.

Problem it solves

Sunk-cost paralysis and ego-driven persistence on bets that have stopped working.

Best for

Operators running a portfolio of bets who need to recycle capital and attention quickly.

Not ideal for

Ventures that genuinely require long J-curves before signal (premature kill risk).

Overview

Why this framework exists

Rubin treats a fast, clean loss as a win for the operator who took it. The discipline: when you know a bet won't work, end it immediately, return capital, and don't carry embarrassment. The opposite mentality — protecting your record — is how you become irrelevant. He frames mistakes as motivating, and pairs the fast kill with a 'never reflect, always think we've done nothing yet' restlessness.

Core principles

4 total
  1. The moment you know it won't work, stop — don't let a known loser run on ego.
  2. Return outside capital rather than spending it down to save face.
  3. A fast loss is a point of pride, not embarrassment.
  4. Acknowledge, fix, move — 'when we make a mistake, we acknowledge it, we fix it, we're right on it.'

Origin story

How this framework came to be

Fanatics raised $100M from outside investors for an NFT business in 2021. Within four months Rubin knew it wouldn't work, gave investors their money back, and counts it as a 'fast great L' he was proud to take quickly.

Source

Traced to primary
Source · VIDEO
Michael Rubin on Building Fanatics Into a Billion-Dollar Empire (Boardroom cover story)
Boardroom (Rich Kleiman) · 2025
Open source →

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