The prediction markets on Polymarket remain heavily concentrated on US-Iran tensions and the Strait of Hormuz standoff, collectively accounting for over $65M in open interest. The Democratic Presidential Nominee 2028 market continues to dominate overall volume at $1.25B, reflecting sustained political speculation ahead of the 2028 election cycle. Sports and crypto markets round out the top 20, with tennis, MLB, WNBA, and bitcoin price markets seeing elevated activity.