California Pizza Kitchen ( CPKI) rose 4.5% to $19.59 after the restaurant operator raised its profit estimate for the third quarter to a range of 4 cents to 5 cents a share.

The company said revenue rose 13.5% to $162 million for the quarter, and same-store sales were up roughly 3.5%. California Pizza Kitchen had forecast a comp sales increase of 2% to 3% and earnings of 3 cents to 4 cents.

Altair Nanotechnologies ( ALTI) jumped after the company released details from a successful public demonstration of an all-electric Fiat Doblo to government officials and potential commercial customers in Oslo, Norway. The car was powered by an Altair battery.

AeroVironment ( AVAV), Micro-Vett and Go Green Holding also participated in the trial last week. The car traveled 186 miles, and the custom battery pack was fully recharged in less than 10 minutes a total of three times using AeroViroment's charging system. The vehicle is being tested for 60 days. Altair was surging 36% to $4.70, and AeroVironment was up 5.4% at $26.56.

Miramar Mining ( MNG) advanced 23.5% to $6.36 on word that Newmont Mining ( NEM) will buy the company for around $1.5 billion. Newmont will pay C$6.25 in cash for each share of Miramar.

Shares of Newmont were gaining 1.7% to $45.60.

IT services provider Yucheng Technologies ( YTEC) gained 7% to $14.24 after the company won contracts with Agricultural Bank of China, Bank of Beijing, Huishang Bank and Guangdong Development Bank.

Yucheng will provide risk management and performance measurement consulting and implementation services.

Fertilizer maker Mosaic ( MOS) was gaining 6.9% to $54.93 after it said its fiscal first-quarter earnings rose to $305.5 million, or 69 cents a share, from $109 million, or 25 cents a share, a year earlier. Analysts were looking for 58 cents in the latest quarter.

Sales for the first quarter soared 55% to $2 billion. Mosaic said prices for phosphates remain strong and prices for potash have increased, "which should result in very strong earnings and cash flow for the remainder of fiscal 2008."

Sony's ( SNE) stock eased following the company's decision to lower prices on its PlayStation 3 in Japan.

According to reports, the price of the 20-gigabyte console will be cut by around 10% to about $380, and the 60-gigabyte machine will go for the equivalent of $470, down from $500 currently. Sony was losing 1.5% to $49.29.