Berkshire: Huge 51%+ Gap vs S&P 500 + Cash Pile + AI Play?

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I've been talking about Berkshire Hathaway (BRK.B) for a while and I think the opportunity is better than ever. Berkshire is presenting a rare long-term buying opportunity.
As shown in the chart (May 2025 – May 2026):
  • BRK.B: -8.86%, while
  • SPX: +42.49% a gap of over 51 percentage points — one of the widest divergences in modern history.

snapshot
The ratio between BRK.B and SPX (BRK.B / SPX) has collapsed to the 0.65, while in the past it used to be close to 1. Still, Berkshire maintains a very high long-term correlation with the S&P 500.
This setup is in my opinion a strong mean reversion ahead.

Key fundamentals I like:
  • P/E ratio: 15
  • P/B ratio: 1.4 (near multi-year lows)
  • Record cash pile: $373 billion for opportunistic acquisitions or buybacks

What you’re buying:
  • Diversified powerhouse: insurance (float = cheap capital), railroad (BNSF), manufacturing, and utilities.
  • Premier equity portfolio: Apple (largest holding), American Express, Bank of America, Coca-Cola, Chevron, Occidental, and more.
  • AI second-derivative play (YES, AI!!) via Berkshire Hathaway Energy (BHE): Data centers drove ~half of U.S. electricity demand growth in 2025, with massive load growth continuing into 2026–2027. BHE is ideally positioned in key regions and actively expanding for hyperscaler demand
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Historically...
Historically, over the very long term (since 2000), Berkshire Hathaway has significantly outperformed the S&P 500.
For example, during the dot-com bubble, Berkshire was far more stable, and then exploded after the dot-com era.
snapshot
Post-Buffett (Greg Abel now leading), the culture and discipline remains strong. The stock has shifted from “expensive” to genuinely cheap. Really. No brainier here.

Positioning Idea:
My Kelly Criterion curve indicator points to 3× optimal leverage. So my "conservative" play is 2× via Direxion Daily BRK.B Bull 2X ETF BRKU

Let me know your thoughts on this one. I think there's a very decent expected value in this play. The Berkshire meeting is happening this week, and it might reveal a new positive cycle for the company.

Quick note: I'm just sharing my journey - not financial advice! 😊
- Henrique Centieiro

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