After posting a massive gain yesterday, Applied Digital stock is heading lower Friday.Applied Digital (APLD -6.58%) stock is losing ground Friday after posting huge gains in yesterday's session. The company's share price was down 3.7% as of 2:10 p.m. ET. At the same point in the day, the S&P 500 (^GSPC -1.67%) was down 1.8%, and the Nasdaq Composite (^IXIC -2.29%) was down 2.5%.Applied Digital stock had been down as much as 13.2% shortly after the market opened, but its valuation has regained significant gr ...