The 67% market-implied odds favoring no engagement for Cardi B and Stefon Diggs in 2026 stem primarily from the couple’s documented on-again, off-again pattern since welcoming their son in late 2025. Public splits and reconciliations, including a February breakup near Super Bowl timing, followed by April and May reunions, have created persistent uncertainty. June statements from Diggs describing their dynamic as “great” yet deferring relationship details to Cardi, alongside a viral argument clip he downplayed, reinforced co-parenting focus over romantic milestones. July rumors of a quickly deleted Instagram engagement post and renewed split speculation further eroded momentum, with no verified proposal despite earlier “on the agenda” comments. Cardi’s Little Miss Drama Tour and Diggs’ free-agency status add practical headwinds, leaving traders to view the volatility and absence of confirmed progress as decisive signals against a 2026 ring.