Morning Market Losers

Allegheny Technologies Incorporated (NYSE: ATI) shares fell 8.95 percent to $25.64 after the company issued a weak Q2 forecast. Allegheny Tech projected a Q2 loss of $0.17 to $0.15 per share.

Marten Transport, Ltd (NASDAQ: MRTN) shares declined 7.67 percent to $21.06 after the company reported downbeat Q2 results.

Swift Energy Company (NYSE: SFY) dropped 7.81 percent to $1.18. HMS Holdings Corp (NASDAQ: HMSY) will replace Swift Energy in the S&P SmallCap 600, after the close of trading on July 17.

Gevo, Inc. (NASDAQ: GEVO) dipped 5.66 percent to $2.17 after the company appointed Johannes Minho Roth to Gevo's board. Ganesh "Kish" Kishore will resign from the board.

Mead Johnson Nutrition CO (NYSE: MJN) shares dipped 3.80 percent to $84.78 trading after the company lowered its FY15 earnings guidance.

Yum! Brands, Inc. (NYSE: YUM) shares dropped 2.59 percent to $89.21. Yum! Brands reported better-than-expected earnings for its second quarter, but the company's sales missed analysts' estimates.

Delta Air Lines, Inc. (NYSE: DAL) shares slipped 2.06 percent to $42.76. Delta Air reported stronger-than-expected Q2 results. However, the company projects a decline in Q3 unit revenue.