“To protect market integrity in our crypto up/down markets, we're updating how these markets resolve,” Polymarket said in the X post detailing the changes. “To support liquidity through this transition, we're adding $1M in liquidity rewards across all impacted markets through the month of August.” Five-minute markets will use a 30-second average, while 15-minute and four-hour markets will use a 60-second average, the platform explained. “The vulnerability is structural,” the researchers from Stanford University and Singapore Management University wrote. “An asset-price contract settles on a financial price, and that price can be moved by trading the underlying market itself.”