3 Monster Stocks to Hold for the Next 20 Years

MercadoLibre reported revenue up 45% YoY in Q4, serves 121M marketplace buyers and 78M Mercado Pago MAUs, with its credit portfolio +90% YoY and revenue CAGRs of 46% (10y) and 40% (3y), signaling a large underbanked runway in Latin America. Lululemon has a ~19% 10-year revenue CAGR but showed a slowdown with revenue +7% YoY in the latest quarter and tariff-related margin pressure; Mainland China is 18% of revenue and grew +46% YoY, and the stock trades near a 12x P/E. Costco has 81M paid members (FY2025), membership growth of +6.2% in FY2025 (+7.3% in FY2024), and 633 U.S./PR warehouses of 923 worldwide, indicating substantial international expansion runway.

Analysis

MercadoLibre's core advantage isn't just marketplace scale — it's that payments and credit create a funding flywheel that can be monetized beyond interchange: think merchant lending, working-capital float and embedded financing for sellers. As credit penetration climbs, the marginal ROI will shift from marketing-led GMV growth to balance-sheet economics, which increases sensitivity to defaults, reserve policy and local funding costs; securitization or local wholesale funding will likely be the next inflection point for ROE.

Lululemon's growth vector is increasingly geographic and product-led rather than a simple SSS recovery; that implies operating leverage will be driven by fixed-cost absorption in distribution and brand marketing in new regions, and margin recovery depends as much on tariff/transport optimization as on demand. Tariff-induced cost noise and inventory mix risk create a two-way bet: upside if China and international channels scale without promotional pressure, downside if higher landed costs force markdowns.

Costco's optionality is real but slow: each new warehouse is a multi-year, low-volatility earning asset that compounds membership economics; international rollouts are capital-efficient relative to online customer acquisition but carry localization execution risk (real estate/site selection and SKU assortment). The second-order winners across all three are 3PL/last-mile providers in LatAm and specialty logistics partners for cold-chain and high-value goods — these vendors will command higher margins as platform-driven fulfillment complexity rises.

Key Decisions for Investors

• Long MELI (core position, 1–2% NAV): accumulate on 8–12% pullbacks with a 24–36 month horizon; protect downside by buying a 9–12 month put spread (buy ~30% OTM, sell ~15% OTM) sized to cover 30–40% of the equity allocation — R/R: asymmetric upside from fintech monetization, downside limited by hedge; tail risks are FX and rising consumer delinquencies.
• Long COST (2–3% NAV, low turnover): stagger purchases over 12 months to average into expansion risk; fund by selling near-term (3–6 month) covered calls to monetize carry while waiting for international compounding — R/R: slow steady upside from membership lift, low volatility; watch for real estate missteps and temporary membership churn as catalysts to add.
• Tactical LULU trade (0.5–1% NAV): buy 18–30 month LEAPS to capture international re-acceleration, size small due to tariff/inventory risk; consider pairing with short-dated calls to reduce cost. Alternatively, a long LULU / short domestic apparel peer pair (matched dollar exposure) isolates international execution upside from U.S. cyclical weakness — R/R: high payoff if China/international S&T scale, high haircut if tariffs/markup compression persist.