Nu Holdings Jumps 10% to a Five-Month High, StoneCo Drops 6% as Nubank Breaks From the Pack

Nu Holdings (NU) surged ~10% to $15.35 after Q2 2026 results, delivering net income of ~$1.06B (vs. $967M estimate) and growing gross revenue to nearly $5.9B (+39% YoY). The key upside was margin expansion: net interest margin rose 180 bps to 22.9% and risk-adjusted NIM expanded 290 bps to 12.4% (from 9.5% in Q1). Offsetting caution: 90+ day NPLs increased 35 bps to 6.9% and the efficiency ratio worsened to 19.5% (from 17.6%), while credit cost declined QoQ but remained ~60% above last year; Susquehanna lifted its PT to $16 from $13, leaving limited near-term upside if the stock stays near target.

Analysis

NU is being rerated as a quality funder-then-lend platform, while the rest of the Brazil fintech complex is being treated as more credit-sensitive and less scalable. The second-order winner is NU's deposit franchise: if it keeps growing cheaper liabilities faster than assets, it can keep taking share without needing the capital intensity that hurts STNE-type models. That also pressures smaller lenders and payment processors that lack NU's funding edge, because any price cuts to defend share will hit their already thinner margins.

The move is stronger than the near-term fundamental surprise because the market is not just pricing earnings; it is pricing durability of a 30%+ ROE regime. The key issue over the next 1-3 months is whether the uptick in late delinquencies proves seasonal or becomes the first sign that growth is being pushed into lower-quality cohorts. If credit costs re-accelerate or risk-adjusted NIM mean-reverts, the stock can give back a meaningful part of the gap even if revenue remains strong.

Contrarian view: consensus may be underestimating how much of the beat is simply a function of mix and rate dynamics rather than a permanently higher earning power. With the stock already near fair value on current street targets, upside likely depends on rapid target revisions and evidence that Mexico/U.S. can contribute incremental revenue within 2-3 quarters. Absent that, NU may be a better relative-value long than an absolute long here.

Key Decisions for Investors

• Prefer a 1-3 month pair: long NU / short STNE. The setup captures credit-quality and funding-franchise dispersion; use a 3-5% retrace in NU or a failed bounce in STNE as entry, and exit if NU 90+ day NPLs keep rising next quarter.
• Do not chase NU outright after a 10% gap unless you see sell-side target raises within 2 weeks. A better entry is on a post-earnings consolidation toward the prior breakout level; risk/reward improves materially if the market gives back half the gap.
• Short or underweight FINX on the thesis that the tape is rewarding one idiosyncratic compounder, not the sector. If the ETF continues to lag while NU holds gains, the relative-value signal strengthens; cover if broader fintechs start revising up guidance.
• Watch item: if NU's risk-adjusted NIM stays above the implied street level on the next print and delinquency trends normalize, the valuation can re-rate higher for 6-12 months; if not, trim aggressively because the market is paying for peak-quality earnings today.