Kalshi on Wednesday said it fined and suspended an employee of the popular YouTuber MrBeast for insider trading, marking one of the first disciplinary actions within the fast-growing prediction market industry.The case involved bets related to MrBeast's videos, which were flagged by Kalshi's surveillance team for their "near-perfect trading success on markets with low odds," according to the company's statement. In a regulatory notice, Kalshi identified the individual behind the wagers as Artem Kaptur, whom the company said was employed as an editor for MrBeast while he traded on non-public information he obtained through his job.…