A new prediction markets startup with strong ties to billionaire Thomas Peterffy is hiring staff and preparing to launch, job postings and corporate filings reviewed by Business Inside show. Lumina Markets began advertising last week for roles in marketing and legal. Job listings say it's "backed by a billionaire pioneer of electronic trading," and note that it's preparing to launch a new prediction markets platform. The jobs were posted on LinkedIn by an employee at Interactive Brokers, the trading giant founded by Peterffy.