Orexigen Therapeutics Inc. (Nasdaq: OREX) shares were up 8.4 percent to $9.02, on volume of 4.9 million, towering over a daily average of 2.8 million, as a regulatory decision was expected Monday on its diet pill.

Micron Technology Inc. (Nasdaq: MU) traded in 26.9 million shares, trailing its daily volume of 35.8 million. Prices for the stock increased 1.5 percent to $10.53, after Sterne Agee & Leach raised its price target to $17 from $12. Sterne continues to rate MU at Buy.

First Federal Bancshares of Ark (Nasdaq: FFBH) shares fell 12.2 percent to $2.15, on volume of 123,318 shares, eight times its daily average. The small southwestern bank announced a recapitalization plan that will allow an investment group to buy up to $55 million of common stock, diluting shareholders.