Somewhere in São Paulo, a bank is doing what JPMorgan, Citi, and every legacy financial institution on the planet has failed to do: making banking cheap enough to serve everyone — and turning a massive profit doing it.
Nu Holdings, traded on the NYSE under ticker NU, has quietly built the largest digital banking platform in Latin America. With 127 million customers and growing, it’s not a fintech experiment anymore. It’s a financial juggernaut that most American investors have never heard of.
Here’s the number that should make traditional bankers sweat: Nu services each customer for roughly $0.90 per month. Traditional Brazilian banks? Between $12 and $15 per customer. That’s not a competitive advantage — that’s a structural demolition of the old model. Nu built its entire tech stack from scratch, which means no legacy systems, no bloated infrastructure, and no excuses.
The company started in 2013 when Colombian-born David Velez tried to open a bank account in Brazil and it took months. He saw the dysfunction as opportunity. Brazil’s banking sector was — and largely still is — an oligopoly of a handful of massive banks that charged high fees and treated customers like an afterthought. Nu launched with a simple, no-fee credit card. Word of mouth did the rest. The company’s Net Promoter Score hit the 90s — a near-impossible figure in any industry, let alone banking.
The skeptics said Nu would get crushed by credit losses. Instead, the company developed a “low and grow” lending model: start borrowers with micro-limits as low as $10, watch their real-time payment behavior, and gradually increase credit. The result? A return on equity of 31% as of late 2025 — nearly triple the banking industry average. They’re lending to customers traditional banks won’t touch, and doing it more profitably than the incumbents can lend to the wealthy.
Now Nu is exporting the playbook. In Mexico, it hit 13 million customers in just two years by partnering with OXXO’s 23,000+ retail locations for cash deposits — solving the “no branches” problem without actually building any. Earlier this year, Nu received conditional approval for a U.S. National Bank charter, eyeing the massive remittance corridor between North and South America.
The stock isn’t cheap by traditional bank metrics — trading above 7x book value versus JPMorgan’s typical 1.2-2.5x. But comparing Nu to a traditional bank is like comparing Netflix to Blockbuster. With its cost structure and growth trajectory, it operates more like a high-margin software company that happens to have a banking license. For investors looking beyond the U.S. for genuine disruption stories, Nu might be one of the most compelling ones running.