**Alexa Grasso leads the market at 64.5% implied probability as the consensus choice for Natalia Silva’s first title defense.** Silva captured the vacant women’s flyweight championship with a unanimous decision over Wang Cong at UFC 332 on October 3, 2026, extending her UFC win streak to 9-0. Grasso sits as the highest-ranked available contender following back-to-back victories and holds a prior Octagon history with Silva from a 2025 loss. Valentina Shevchenko’s extended injury absence has shifted focus away from an immediate rematch, while Erin Blanchfield trails at 14.1% amid a deeper but less immediate contender pool. The pricing reflects trader emphasis on Grasso’s positioning, recent momentum, and the division’s need for an active titleholder rather than waiting on sidelined veterans.