Michael Burry
· Cassandra Unchained
· May 17, 2026 at 19:59
· ⏱ 5 min read
| Read on Substack ↗
Summary
Michael Burry’s newsletter is a charity appeal for the National Brain Tumor Society, not a market or trade thesis. It highlights the complexity of cancer subtypes, the need for continued private research funding amid federal cuts, and personal stories of glioblastoma. No actionable financial implications emerge from the text.
•May is Brain Tumor Awareness Month; May 17 is International Oligodendroglioma Day.
•Glioblastoma (GBM) is the most aggressive brain tumor; Burry lost analyst Joseph Sipley to it in 2019 and friend Guy Spier is currently fighting it.
•Joseph Sipley lived 8 years post-GBM diagnosis due to cutting-edge research.
•There are over 100 recognized types of brain and central nervous system tumors.
•A 2015 paper showed breast cancer subtyping yields conflicting results (5–13 classes depending on method), illustrating classification complexity across all cancers.
•The National Brain Tumor Society’s flagship initiative is the DNA Damage Response Consortium; it also advocated for the BRAIN Act.
•Recent federal funding cuts increase pressure on private charities; overall cancer death rate is declining due to research and advocacy.
•Burry is donating 5% of gross revenues from his Substack for May 2026 to the charity.