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A man photographs a Roblox banner displayed, to celebrate the company's IPO, on the front facade of the New York Stock Exchange (NYSE) in New York, March 10, 2021.Brendan McDermid | ReutersCheck out the companies making headlines in premarket trading.Roblox — Roblox shares fell 6.7% after Morgan Stanley downgraded the gaming company to underweight from equal weight and said the upside is limited following the stock's recent outperformance.related investing newsDiscover — The online bank lost 7.3% despite beating…

A Norwegian Gateway cruise ship leaves from the Manhattan port during sunset in New York City, United States on April 10, 2022.Tayfun Coskun | Anadolu Agency | Getty ImagesCheck out the companies making the biggest moves midday:Norwegian Cruise Line — Shares sunk more 4.83% after the cruise ship operator reported in a filing with the Securities and Exchange Commission that it will report a net loss for the fourth quarter and full year of 2022, as well as the first quarter of 2023.Charles Schwab — The bank stock lost 6.22%…

Virgin Orbit's LauncherOne rocket on display in Times Square, New York.CNBC | Michael SheetzCheck out the companies making the biggest moves midday:Virgin Orbit — The satellite launch service company fell 13.99% a day after it confirmed its first launch out of the United Kingdom Monday failed to reach orbit. The mission was Virgin Orbit's sixth to date, and its second launch failure.Danaher — Shares of Danaher rose 4.64% after the maker of medical, industrial and commercial products issued upbeat guidance for…

CNBC's Jim Cramer on Tuesday highlighted his list of "dirty dozen" companies that exemplify the losses incurred by investors who funneled their cash into initial public offerings and other risky stocks."Some of the most egregious offenders were the dirty dozen that hit you with repeated unsportsmanlike conduct … and ultimately put your portfolio on injured reserve," he said.related investing newsHere are the stocks most heavily shorted on Wall Street, including this underperforming retailerHere are the dirty…