S&P shakeup: Cubist moves up, B&N moves down, Annie's arrives

|By:, SA News Editor

Cubist Pharma (CBST) will join the S&P MidCap 400. The drug developer will replace Smithfield Foods, which is being acquired by China's Shuanghui International.

SAI's Science Applications spinoff is also joining the MidCap 400, and will do so at the expense of Barnes & Noble (BKS), which is getting sent down to the S&P  SmallCap 600. B&N will displace RadiSys (RSYS) in the index.

SAI is being renamed Leidos Holdings, and will trade in the MidCap 400 under the symbol LDOS. Science Applications will trade under the symbol SAIC.

Organic macaroni maker Annie's (BNNY) is taking Cubist's spot in the SmallCap 600.

All changes take place after Thursday's close.