A weekly look at the financial sector from a former analyst and hedge fund partner.
Net Interest is a weekly newsletter on the financial sector by Marc Rubinstein, a former investment-bank analyst who spent ten years as a partner at a hedge fund. Each issue explores a theme trending in the sector. The About page says paid subscribers ($30 a month) unlock the second half of each issue, a searchable archive of 250+ issues and a subscriber podcast. Prices are the publication's web subscription prices on Substack.
Want to see what you get before paying? Read recent issues in the official archive.
Facts checked on 2026-10-22 at the official page. Prices can change; confirm before you subscribe. We do not publish ratings or performance claims.