Nneka Ogwumike, an 11-time WNBA All-Star and 2016 MVP, has issued a stark warning regarding the adverse impact of prediction markets on athlete safety. Speaking at the Fortune Most Powerful Women Summit in California, Ogwumike emphasized that these platforms have fostered an environment of "vitriol" that directly targets players based on their performance.
The Rise of Prediction Markets
Platforms such as Kalshi and Polymarket are experiencing explosive growth, recently reaching a combined weekly trading volume of $22.2 billion. Unlike traditional sportsbooks, these platforms are often classified as financial exchanges, allowing them to bypass certain regulations and restrictions typically associated with gambling.
“It’s not a safe place for athletes,” Ogwumike told Fortune. “Players are definitely having a hard time dealing with the vitriol that comes with prediction markets as it relates to our performance.”
Alarming Data from Collegiate Sports
The issue of harassment extends beyond the professional ranks. According to a 2025 NCAA study, more than half of Division 1 men’s basketball players reported social media abuse linked to their on-court performance. Crucially, 46% of those negative or threatening messages originated from individuals who had placed a bet on the game in question.
Industry and League Response
In response to the growing concerns, both the NBA and WNBA have announced a responsible gaming campaign in partnership with the National Council on Problem Gambling (NCPG). While resources are being made available to mitigate abuse, Ogwumike noted that many safety concerns remain shielded from public view, yet continue to affect the performance of athletes.
