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Prediction-market weekly volume hits record $10.8 billion as Polymarket faces WSJ scrutiny

Prediction-market weekly volume hits record $10.8 billion as Polymarket faces WSJ scrutiny

a16z Crypto said weekly volume hit $10.8 billion and open interest reached $1.48 billion in the week ended June 15, while a Wall Street Journal investigation challenged viral Polymarket profit videos aimed at U.S. audiences.

Fact Check
The a16z crypto X post directly confirms the record $1.48 billion open interest for the week ending June 15, 2026, describing it as a second consecutive record. Gate News and Prediction News both attribute the record $10.8 billion weekly trading volume to a16z crypto data, with Gate noting it was the first time exceeding $10 billion. The Cryptopolitan article corroborates the $1.48 billion open interest record and substantiates the claim about Polymarket facing a Wall Street Journal investigation over alleged marketing tactics (paying creators to post fabricated trading videos). All components of the claim are consistent across multiple independent sources, including the primary a16z source.
Summary

Prediction-market activity is accelerating, with weekly volume reaching a record $10.8 billion and open interest rising to a fresh high of $1.48 billion in the week ended June 15, according to a16z Crypto. The firm said open interest has increased about sixfold over the past year, suggesting traders are keeping positions open longer as the sector broadens beyond marquee events into politics, the economy, culture and crypto. At the same time, The Wall Street Journal reported that Polymarket paid social media creators about $2,000 to $3,000 a month to post videos showing simulated bets and fabricated profits on dummy sites resembling its platform, including viral clips portraying easy winnings on Donald Trump word-bet markets, raising regulatory and disclosure questions because Polymarket has been barred from offering its main platform to Americans since a 2022 Commodity Futures Trading Commission settlement.

Terms & Concepts
  • prediction market: A market where traders buy and sell contracts tied to the outcome of future events.
  • open interest: The total value of outstanding positions or unresolved bets that remain open rather than closed or settled.
  • Commodity Futures Trading Commission: The U.S. derivatives regulator that reached a 2022 settlement barring Polymarket from offering its main prediction-market platform to Americans.