U.S. stocks closed higher on Wednesday after rebounding from Tuesday's decline. The Dow Jones Industrial is back to positive territory for the year. Airlines soared in the rally. Shares of Delta (DAL), United Continental (UAL) and American Airlines (AAL) are all up nicely. Biotech firms surged higher. Jazz Pharmaceuticals (JAZZ) was one of the biggest gainers in the sector, up more than 8%. King Digital (KING) the maker of Candy Crush Sags slid 23%. SeaWorld (SEAS) plunged almost 33%. Both stocks suffered their biggest one-day decline ever after weaker-than-expected revenue. Thursday will be a big earnings day for retailers. Investors will be watching for Walmat (WMT) Nordstrom (JWN) and JC Penney (JCP) to report quarterly results. TheStreet's Susannah Lee has details from Wall Street.