With all drivers priced at identical 49.5% implied probabilities, the market reflects broad uncertainty heading into Spanish Grand Prix FP1. Under the 2026 regulations featuring active aerodynamics and revised power units, teams routinely prioritize long-run data, tire allocations, and component testing over single-lap pace, producing highly variable times that often favor no single constructor. Recent Barcelona FP1 results illustrated this pattern, with Mercedes, McLaren, and Ferrari runners mixing at the front while midfield squads posted competitive laps during their respective programs. New driver lineups and rookies add further variables, keeping the session wide open until the chequered flag.