Mark Spitznagel
Mark Spitznagel of Universa Investments.
  • A "Black Swan" investor says there's a huge debt bubble and the Fed's policies will end in disaster.
  • Universa's Mark Spitznagel views Treasuries as a "hopeful haven" that offers limited protection.
  • Spitznagel said that portfolio diversification can be more harmful than helpful to investors.

The boss of a "Black Swan" fund has sounded the alarm on the biggest debt bubble in history, and warned the Federal Reserve's efforts to shore up markets and stave off recessions have paved the way for a far worse disaster in the future.