The Miami Heat’s accidental release of a YouTube video titled “LeBron James Introductory Press Conference” triggered a surge in prediction market bets on James joining the team. The video, posted and quickly deleted on Tuesday night, led to combined trading volumes of $245 million on Kalshi and Polymarket regarding James’s next NBA destination, with Kalshi alone accounting for over $200 million, according to fortune.com.
The Heat confirmed the video was posted in error while preparing for the possibility of James joining this offseason. James remains a free agent after leaving the Los Angeles Lakers 24 days ago, with no announced timeline for his decision. Following the video’s removal, Miami posted a job opening for a director of YouTube strategy, further fueling speculation. On Polymarket, Miami’s odds to sign James jumped from 31.5% to nearly 50%, overtaking Cleveland, which had been favored just a day earlier.
The spike in betting volume reflects heightened market interest in James’s next move, with total wagers rising from $76 million weeks ago to $245 million currently. Kalshi’s spokesperson confirmed the platform’s volume on James’s landing spot has surpassed $170 million. This betting activity highlights how social media events can rapidly influence market sentiment and betting behavior in sports prediction markets.
The Miami Heat’s YouTube video incident caused Miami’s odds on Polymarket to jump 20 percentage points overnight, driving total market volume on James’s next team to $245 million, with Kalshi’s share exceeding $200 million, according to fortune.com.