Dr. Joon Yun is president and managing partner of Palo Alto Investors, LLC, a hedge fund founded in 1989 with $2 billion in assets invested in healthcare. Board certified in radiology, Yun served on the clinical faculty at Stanford from 2000 to 2006. Yun has served on numerous boards, and he is currently a trustee of the Salk Institute. Joon and his wife Kimberly launched the $1 million Palo Alto Longevity Prize and donated $2 million to support the National Academy of Medicine’s Longevity Grand Challenge. He received his M.D. from Duke Medical School and B.A. from Harvard College.