A stealth prediction markets startup has deep ties to Interactive Brokers' billionaire chairman Thomas Peterffy

Thomas Peterffy

ERIC PIERMONT/AFP via Getty Images

• Lumina Markets, a new prediction markets startup, shares staff and an address with the trading giant Interactive Brokers.
• Job listings say it's "backed by a billionaire pioneer of electronic trading" and describe a "trillion-dollar opportunity."
• Interactive Brokers already has a predictions market, ForecastEx, which has struggled to compete with giants like Kalshi.

A new prediction markets startup with strong...