Attackers targeted some of the biggest names in finance by impersonating trusted IT personnel

A wave of voice-phishing attacks targeting some of Wall Street’s largest hedge funds and private equity firms is exposing a weakness that stronger passwords, multifactor authentication and other identity safeguards cannot fully address. Employees can still be tricked into believing they are speaking with someone they trust.

Point72 told investors that no customer information had been stolen, while Two Sigma said it had no indication that its data or systems were affected. Citadel declined to comment on whether its systems had been breached...