Walk into a neighborhood shop in Sao Paulo and you will see the lime-green card reader on the counter. For years, that box was the limit of the story. Today, StoneCo Ltd. NASDAQ:STNE is moving from the counter to the back office. Management recently rebranded as the bank for entrepreneurs, signaling a shift from a simple payments processor to a full-stack financial hub. Management is expanding the business model to own the merchant's entire balance sheet.
Potential Bull Cases
1. StoneCo Is Morphing Into the Central Nervous System for Brazilian Merchants
Management is successfully pivoting the business from a commoditized payment processor into an integrated financial hub. By the second quarter of 2026, the active client base reached 4.8 million merchants. These users are increasingly using the platform for more than just credit card swipes. Retail deposits grew 22% year over year to R$10.8 billion. When a merchant uses the same account to collect sales, pay suppliers, and manage taxes, the relationship becomes incredibly sticky. Integration of Pagar.me into the core Stone platform further solidifies this grip. It creates a single view for online and physical sales that makes it difficult for a customer to leave.
2. The Credit Portfolio Has Become a High-Margin Growth Engine
The credit business is scaling rapidly and now acts as the primary engine for revenue growth. The total credit portfolio reached R$3.8 billion in the second quarter of 2026, which is double the size of the book from the prior year. This expansion drove a 153% jump in credit revenue compared to the same period in 2025. Management is essentially using its data advantage to lend to merchants whose daily cash flows already run through StoneCo accounts. Because the company sees every transaction, it can underwrite risk more effectively than a traditional bank. This mechanism turns payment data into a high-margin lending machine.
3. Government Guarantees Provide a Structural Safety Net for Lending
New government-backed lending programs provide a structural safety net for the credit expansion. StoneCo recently disbursed roughly R$334 million in government-guaranteed loans, primarily through the FGI PEAC program. Under this framework, the government guarantees about 75% of the defaulted amount. This dramatically lowers the risk for the company. It allows management to pursue larger clients and offer more competitive rates without taking the full brunt of a potential default. This guarantee reduces the provision expenses required for these loans. It improves the risk-adjusted returns on the portfolio and allows the company to grow safely even in a rocky economy.
4. Operational Leverage Is Driving Significant Earnings Growth
Operating leverage is finally showing up in the bottom line as management aggressively cuts costs and uses technology. Cost of services, when excluding loan provisions, actually dropped 1% year over year in the second quarter of 2026. Management achieved this by reducing the workforce in early 2026 and deploying artificial intelligence to handle operational tasks. Administrative expenses also fell 6% compared to the prior year. The company is proving that it can grow its merchant base and credit book while keeping fixed costs flat. This discipline allowed adjusted basic earnings per share to grow 9% in the recent quarter despite significant macroeconomic headwinds.
5. Aggressive Share Buybacks Are Concentrating Value for Shareholders
The company is a massive buyer of its own stock, which creates a significant tailwind for remaining shareholders. Management spent R$3 billion on share buybacks in the 12 months ending June 30, 2026. This move retired more than 40 million shares. On top of that, the company paid a massive extraordinary dividend of $2.53 per share in May 2026 following the sale of its Linx software business. These returns show a management team that is disciplined about capital allocation. When the market undervalues the business, management steps in to shrink the share count. This increases the ownership stake and earnings power for every person who holds the stock.
Potential Bear Cases
1. Elevated Interest Rates Create a Massive Financial Drag
Higher interest rates in Brazil create a massive headwind that eats into profit margins and makes growth targets harder to hit. The Brazilian Central Bank kept the Selic rate higher for longer than management expected at the start of the year. Every 100-basis-point increase in the Selic rate carries a pretax hit of roughly R$200 million to R$250 million. Management admitted that these elevated rates make the full-year 2026 goals more challenging. While the company still aims for the lower end of its adjusted gross profit guidance of R$6.6 billion to R$7 billion, there's little room for error. If rates don't fall, the cost of funding will stay elevated.
2. Deteriorating Credit Quality Among Large Merchants Threatens Stability
Credit quality is showing signs of strain as defaults rise among larger merchants. The nonperforming loan ratio for installments overdue by more than 90 days climbed to 8.6% in the second quarter of 2026. This is a significant jump from the 4.7% seen a year earlier. The company is facing defaults on some of its largest exposures, including a retailer that filed for bankruptcy with a loan of roughly R$11 million. These dedicated desk losses prove that lending to larger businesses is riskier and more volatile than management originally hoped. Macroeconomic pressure is pushing more businesses toward bankruptcy, and StoneCo is forced to set aside more cash for these losses.
3. Growth Stalls as the Company Struggles to Retain Mid-Sized Clients
The company is struggling to keep its grip on the lucrative small and mid-sized business segment. While initiatives to reduce churn are working for tiny micro-merchants, the larger small business clients are proving harder to retain. Total payment volume growth was just 4% in the second quarter of 2026. This sluggish pace reflects the intense competition in the Brazilian fintech space. Rivals like Nubank are gaining momentum and breaking away from the pack. If StoneCo can't fix the friction for its larger merchants, it risks losing its most profitable customers to faster-moving competitors. Churn in this core segment remains a load-bearing risk for the entire investment thesis.
The Moneyball Verdict: 70 out of 100
Our proprietary Moneyball scoring system assigns StoneCo an overall Superscore of 70 out of 100, placing it in the Above Average category. The Superscore is an AI-powered score that evaluates a company's overall strength by combining financial performance, product market position, technological capabilities, leadership quality, and relative valuation. It represents the unification of all our scores into a single score for public companies, with five rating bands: Exceptional (90-100), Strong (75-89), Above Average (60-74), Average (40-59), and Cautious (0-39). This score places the company in the Top ~32% of all companies we score, or ahead of roughly 68 out of every 100 companies in our database.
The Superscore for StoneCo corroborates the bull case that its transition into a full-stack financial hub builds a stickier, high-margin business. Brazil's high interest rates and worsening credit quality among large merchants check this momentum. Success requires the company's data advantage to manage rising defaults while the central bank keeps funding costs elevated.