Shares of AMC Entertainment Holdings Inc. /zigman2/quotes/200235402/composite AMC -2.91% bounced 3.9% in premarket trading Friday, after falling 22.2% over the past two sessions. The stock, along with some other meme stocks, took a hit Thursday after GameStop Corp. /zigman2/quotes/203755179/composite GME -2.27% disclosed that the Securities and Exchange Commission was looking into the "trading activity" in its stock and those of other companies. GameStop's stock rallied 6.1% ahead of Friday's open, after tumbling 27.2% on Thursday. Late in Thursday's session, AMC's credit rating was upgraded by two notches, to CCC+ from CCC- , by S&P Global Ratings, which said the movie theater operator's recent equity capital raises "makes it less likely that AMC will pursue a subpar debt exchange or other forms of debt restructuring in the near future." AMC said it raised $1.25 billion from equity in the second quarter, and S&P Global pegged the capital raises at roughly $1.8 billion this year. The credit rating agency said AMC's credit outlook is positive, which suggests potential for another upgrade. The CCC+ rating, which still suggests AMC's debt is " vulnerable for nonpayment ," is still seven notches deep into speculative grade, or "junk" territory. The bounce in AMC's stock, and GameStop's, comes as futures /zigman2/quotes/209948968/delayed ES00 +0.51% for the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.54% edged up 0.1%.