Federal prosecutors investigate whether Wall Street’s biggest lenders illegally dropped customers for political reasons, a source familiar with the inquiry revealed. The probe focuses on banks that may have used political alignment as a criterion for account closures.

The investigation signals heightened scrutiny of banking practices that could undermine customer trust and market stability. If evidence confirms discriminatory de‑banking, regulators may impose fines or mandate policy changes, affecting banks’ compliance budgets and shareholder value.

Investors should watch for potential regulatory actions that could tighten oversight of account eligibility criteria. A finding of misconduct could trigger costly reforms and erode confidence in the financial system’s fairness.