Earnings and economic data are in focus for Thursday, September 22. Rite Aid (RAD) - Get Report reports quarterly results before the markets open. Analysts expect earnings of $0.03 a share on sales of $8.17 billion. During the same quarter a year ago, the retailer reported profit of $0.02 a share with sales of $7.66 billion. Investors will be looking for updates on its pending merger with Walgreens Boots Alliance (WBA) - Get Report . AutoZone (AZO) - Get Report and Scholastic Corporation (SCHL) - Get Report also report earnings before the markets open. On the economic calendar, weekly jobless claims are released at 8:30 a.m. EDT, while existing home sales for August are unveiled at 10 a.m. TheStreet's Scott Gamm reports from Wall Street.