Ethan Brown, founder and CEO of Beyond Meat, prepares to ring the opening bell to celebrate his company’s IPO at the Nasdaq Market site in New York, May 2, 2019.Brendan McDermid | ReutersBeyond Meat stock jumped on Thursday and that’s putting pressure on the hundreds of millions of dollars that investors have bet against the stock.The alternative meat maker will see its plant-based burgers tested at McDonald’s in Canada, an announcement that sent shares of Beyond Meat up 11.6% in trading. The move also meant those shorting the stock lost more than $80 million in mark-to-market losses on the day, according to S3 Partners analyst Ihor Dusaniwsky. Short positions have now lost more than $730 million in market-to-market losses, S3 foound.”BYND has been a major short sale target since its IPO and short sellers have already maxed out stock borrow availability in the stock,” Dusaniwsky said in a note.Beyond Meat’s short interest totals $746 million. Dusaniwsky says the company is the seventh-most shorted stock among U.S. packaged foods and meats companies.”BYND has been a short squeeze candidate for some time now, but shorts have hung onto their positions in a Tesla like fashion. But with mark-to-market losses mounting, stock borrow rates accelerating to the upside and stock recalls hitting the street the likelihood of a short squeeze is very high,” Dusaniwsky said.