Shares of SunPower ( SPWR - Get Report) were among the Nasdaq's winners Tuesday, rising 9% after the solar-electricity company reaffirmed its second-quarter guidance.

The company continues to expect adjusted earnings, which exclude certain items, of 5 cents to 7 cents a share. The company also backed its forecast for revenue of $50 million to $52 million. Analysts polled by Thomson First Call expect earnings of 6 cents a share and revenue of $51.1 million. SunPower shares were trading up $2.62 to $32.07.

Hansen Natural ( HANS) rose 2% after the beverage maker signed an agreement with Cadbury Bebidas, a Mexican beverage distributor, for the distribution of Hansen's Monster Energy drinks in Mexico. "Cadbury Bebidas is a professionally managed and well-established company with extensive distribution arrangement throughout Mexico," Hansen said. Shares were up $4.26 to $182.60.

Shares of Tempur-Pedic International ( TPX - Get Report) rose 2% after the mattress maker boosted its stock buyback plan by $40 million, bringing its total authorization to $220 million. Since the beginning of the buyback, the company has repurchased more than 15 million shares at a cost of $180 million. "We continue to believe the share-repurchase program is an attractive vehicle to significantly increase shareholder value over the long term, particularly in light of the strong cash flow generated by the company's business model," Tempur-Pedic said. Shares were trading up 31 cents to $13.86.

Monro Muffler ( MNRO - Get Report) fell 8% after the auto repair-services company posted in-line fiscal fourth-quarter earnings but issued disappointing first-quarter earnings guidance. The company earned $3.2 million, or 21 cents a share, on revenue of $88.3 million. Excluding stock-based compensation costs, the company earned $3.5 million, or 23 cents a share, matching analysts' mean estimate. During the year-earlier quarter the company earned $2.8 million, or 19 cents a share, on revenue of $81.1 million.

Looking ahead, Monro sees first-quarter earnings of 45 cents to 48 cents a share, with a same-store sales decrease of 2% to 3%. A single analyst is projecting earnings of 63 cents a share. For the full year, the company sees earnings of $1.68 to $1.76 a share on revenue of $410 million to $420 million. Two analysts have an average estimate for earnings of $1.83 a share and revenue of $409 million. Shares were trading down $3.11 to $33.75.

Shares of Getty Images ( GYI) rose 1% after the supplier of stock photographs and images boosted its share-repurchase plan by $100 million, bringing its total buyback plan to $250 million. As a result of the increased buyback plan, the company said it plans to sell some of its short-term investments that are in the red. The company will take a pretax charge of about $4 million during the second quarter related to the losses.

Getty also said it plans to permanently exit some of its New York facilities after a sublease expires in February 2007. The facilities, which have a lease agreement that runs through March 2015, are currently being subleased to another party through February. The company plans to record a pretax charge of about $19 million during the second quarter related to the move. Getty said the charge is consistent with its previously announced estimate. Shares were trading up 95 cents to $65.60.

NYSE volume leaders included Nabors Industries ( NBR - Get Report), up 46 cents to $36.07; Lucent Technologies ( LU), up 5 cents to $2.57; Pfizer ( PFE), up 11 cents to $23.83; Cameron ( CAM), up $2.46 to $48.11; General Electric ( GE), up 7 cents to $34.14; Citigroup ( C), up 25 cents to $49.09; Exxon Mobil ( XOM), up 75 cents to $61.53; and Time Warner ( TWX), up 5 cents to $17.45.

Nasdaq volume leaders included Sun Microsystems ( SUNW), down 16 cents to $4.38; JDSU ( JDSU), down 12 cents to $2.90; Microsoft ( MSFT), up 37 cents to $23.25; Intel ( INTC), up 5 cents to $18.06; Cisco Systems ( CSCO), up 25 cents to $20.85; Apple Computer ( AAPL), up 92 cents to $64.30; and Yahoo! ( YHOO), up 95 cents to $31.41.