Shares of Las Vegas-based Pinnacle Entertainment ( PNK) fell after the casino operator said its public offering of 6 million new shares was priced at $27.35 a share, which will result in gross proceeds of $164.1 million. Pinnacle was down 63 cents, or 2.3%, at $26.88. American Superconductor ( AMSC) rose after the Westborough, Mass., company was chosen to be part of a Northrop Grumman ( NOC) team selected by the Navy to work on the design of a high-temperature superconductor. American Superconductor rose 12 cents, or 1.3%, to $9.38 in recent trading. Shares of Insteel Industries ( IIIN) jumped almost 8% after the Mount Airy, N.C., wire-fabric maker said it would repurchase up to $15 million of its stock during the next year. The company also said it amended its existing revolving credit facility, increasing the commitment amount to $100 million from $75 million and extending the maturity date by two years to June 2010. Insteel Industries rose $1.43 to $19.56 recently. Bookham ( BKHM) dropped after the San Jose, Calif., optical components maker said it was conducting a series of transactions that will retire $45.9 million of secured notes and $19.4 million of convertible debentures. The company also said it signed an agreement with Nortel Networks ( NT) to amend and extend the current supply agreement through 2006. Bookham fell 45 cents, or 7%, to $6 in recent trading. Shares of Bebe Stores ( BEBE) rose after the Brisbane, Calif., women's apparel designer was upgraded from to outperform from market-perform by Morgan Keegan. Bebe Stores rose $1.74, or 12.1%, to $16.15 in recent trading.