Morning Market Losers

Regulus Therapeutics Inc (NASDAQ: RGLS) shares tumbled 12.34 percent to $12.08 after the company reported that Kleanthis G. Xanthopoulos will step down as President and CEO. The company named Paul Grint as President and CEO.ReneSola Ltd. (ADR) (NYSE: SOL) shares dropped 11.19 percent to $1.27. ReneSola reported Q1 earnings of $0.18 per ADS on sales of $349 million. PPL Corp (NYSE: PPL) shares slipped 8.20 percent to $31.92. On Monday, PPL reported the closing of spinoff of competitive supply unit and reaffirmed its FY15 earnings forecast of $2.05 to $2.25 per share. Ctrip.com International, Ltd. (ADR) (NASDAQ: CTRP) shares slipped 7.09 percent to $75.84 following the confirmation of a rejected bid for Qunar Cayman Islands Ltd (NASDAQ: QUNR).Acorda Therapeutics Inc (NASDAQ: ACOR) shares slipped 5.89 percent to $28.58 following the report of a clinical hold. TubeMogul Inc (NASDAQ: TUBE) shares dropped 4.78 percent to $16.32. TubeMogul filed registration for a $75 million common stock offering. The Carlyle Group LP (NASDAQ: CG) declined 4.39 percent to $29.61 after the company reported an offering of 7 million common units.Daktronics, Inc. (NASDAQ: DAKT) slipped 4.08 percent to $10.35. Daktronics reported weaker-than-expected earnings for the fiscal fourth quarter, but the company's sales exceeded analysts' estimates.Delta Air Lines, Inc. (NYSE: DAL) shares fell 2.05 percent to $43.44 after the company announced financial and operating performance for May. Its capacity climbed 4 percent in May, while load factor narrowed to 85.4 percent. Traffic gained 2.7 percent in the month.