Bonus/Severance: Steven Cohen, Samuel Isaly Why billionaire hedge fund manager Steven Cohen is up, and OrbiMed Advisors founder Samuel Isaly is down. Related Articles Premium Hedge Funds Still in Love With Amazon Stephen Taub Biopharma IPOs Have Surged. Will Tech Follow? Steve Taub Unsustainable Debt: Is There a Path for Policymakers and Institutional Investors? Sponsored by Fidelity Investments