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US x Iran ceasefire by March 31?14%US forces enter Iran by March 31?25%Texas Longhorns vs. Purdue Boilermakers25%Will Trump visit China by April 30?5%Will Purdue win the 2026 NCAA Tournament?8%Will Tom Steyer win the California Governor Election in 2026?13%US x Iran ceasefire by March 31?14%US forces enter Iran by March 31?25%Texas Longhorns vs. Purdue Boilermakers25%Will Trump visit China by April 30?5%Will Purdue win the 2026 NCAA Tournament?8%Will Tom Steyer win the California Governor Election in 2026?13%
PREDMARKET

Daily Brief

2026-03-18

Geopolitical tensions in the South China Sea have pushed several conflict-related prediction markets to multi-week highs overnight. Traders are reassessing risk premiums across defense, energy, and shipping disruption markets as naval activity increases in disputed waters. The knock-on effects are visible in oil price threshold markets and broader macro sentiment contracts.

On a lighter note, the NCAA tournament is driving record volumes in sports-related prediction markets. March Madness bracket markets on Polymarket have attracted significant new user inflows, with several upset-heavy first-round results reshuffling championship odds dramatically. These sports markets serve as an effective entry point for new participants who may eventually explore political and financial prediction markets.

For those tracking the bigger picture, geopolitical developments are interacting with Fed rate expectations and election cycle dynamics in ways that create both risk and opportunity across the prediction market ecosystem.

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