Short interest ratio: 5 Insider Buying: $2M Bruker BioSciences Corporation engages in the design, manufacture, service, and marketing of analytical and life science systems and associated products worldwide.

Short interest ratio: 6 Insider Buying: $10M CKE Restaurants, Inc., through its subsidiaries, engages in the ownership, operation, franchising, and licensing of quick-service and fast-casual restaurants in the United States. It operates its restaurants primarily under the brand names Carl's Jr., Hardee's, and La Salsa. Trades for 8x EBITDA

Short interest ratio: 6 Insider Buying: $26.5M General Growth Properties, Inc. operates as a self-administered and self-managed real estate investment trust.

Short interest ratio: 6 Insider Buying: $12M M&F Worldwide Corp., which produces licorice products and provides check-related services, said in early May that its first-quarter profit fell on higher expenses. Trades for 10x EBITDA.

Short interest ratio: 6 Insider Buying: $1.7M Bisys Group Inc., which provides outsourcing services to businesses, said May 10th its fiscal third-quarter net income plunged from a year-ago period which included a large profit from discontinued operations. Trades for 9x EBITDA

Short interest ratio: 8 Insider Buying: $3.9M Trinity Industries, Inc., through its subsidiaries, provides various products and services for the transportation, industrial, construction, and energy sectors primarily in the United States. Trades for 9x EBITDA

Short interest ratio: 10 Insider Buying: $8.7M Advancis Pharmaceutical Corporation engages in the development and commercialization of anti-infective drugs for the treatment various infectious diseases.

Short interest ratio: 10 Insider Buying: $2.6M NutriSystem, Inc. provides weight management and fitness products and services in the United States.