Houston Wire & Cable (HWCC - Get Report) surged after the company said second-quarter sales increased 80% to $84.2 million. The company earned $8.3 million, or 48 cents a share, up from $2.2 million, or 13 cents a share, last year. Shares climbed $1.99, or 11.1%, to $19.97.
Aftermarket Technology (ATAC) gained after the engineering services company was upgraded by UBS to buy from neutral. Shares gained $1, or 4.9%, to $21.43.
CV Therapeutics (CVTX) dropped after the biopharmaceutical company said it's selling 7.5 million shares in a public offering. The company granted the underwriters an option to purchase up to an additional 1.13 million shares to cover overallotments. Shares fell 82 cents, or 7.6%, to $10.03.Double Hull Tankers (DHT - Get Report) slipped after the company was downgraded by Citigroup to hold from buy. Shares dropped 46 cents, or 3.1%, to $14.37.