Midday Losers From October 29: InvenSense, American Realty Capital, Orbital Sciences And More

American Realty Capital Properties Inc ARCP -31% - The company announced non-reliance on previously issued financial statements and changes in accounting personnel. In addition, analysts at BMO Capital downgraded the stock to Market Perform.

InvenSense Inc INVN -24% - The company reported downbeat earnings Tuesday missing EPS estimates by a wide margin. Moreover, multiple analysts downgraded the stock Wednesday.

Orbital Sciences Corp ORB -16% - Shares are down sharply following an explosion of its Antares rocket; the rocket exploded seconds after liftoff from NASA's Wallops Flight Facility in Virginia.

Aspen Technology, Inc. AZPN -14% - Despite beating Q1 2015 estimates, the company slightly lowered Q2 earnings and revenue guidance.

Amtrust Financial Services Inc AFSI -13% - Compass point downgraded shares to Neutral. In addition, a negative Seeking Alpha article on the company was published.