NU (NYSE; trading currency: USD). Nu is a digital bank whose economic engine is growing stronger, driven by low-cost customer acquisition, broader product use, and operating leverage. The main caveat is that lending growth brings real credit risk—not just short-term earnings volatility.
Nu earns money primarily from interest on credit-card balances and personal loans, net of deposit and other funding costs. It also earns card interchange and fees from products such as payments, investments, and insurance. Its app-based model can serve customers at lower cost than a traditional branch network, then deepen revenue as customers adopt more products.
The core business was still expanding in the latest financial reporting available here: FY2025, ended December 31, 2025. Growth across Brazil, Mexico, and Colombia gives Nu a large runway, while higher engagement and cross-selling can lift revenue per customer without proportionate increases in overhead. Customers benefit from accessible, convenient financial services; Nu benefits when those services build durable relationships and profitable balances. That is a plausible win-win, but not automatic: lending to under-served customers can become harmful to both parties if underwriting weakens or repayment burdens rise.
The key long-term test is whether customer growth converts into risk-adjusted returns. Track active customers and product penetration alongside revenue per active customer, cost to serve, net interest margin, delinquency and credit-loss trends, and profitability. Rising revenue alone would be misleading if losses or funding costs rise faster. Brazil concentration, regulatory change, and currency swings add uncertainty; sustained deterioration in credit quality would be the more serious warning of permanent damage.