JEL Code

G11, G12, G13, G22, G23, G32


The well-established methodology for valuing options, the Black & Scholes formula, has been successfully challenged by Warren Buffet; who not only has been critical of the formula for the case of long-dated options, but has also applied a different approach in multi-billion derivative contracts. We study Berkshire Hathaway’s Equity Put transactions from a value-investing point of view. We show that Buffett is not using them as speculative investments, but as a disruptive -and cheap- financing source. We uncover Buffett’s methodology for valuing long-dated Equity Puts as long-term loans.

Submission Date

January 2020

Approval Date


Publication Date