Editor's Note: In this feature from Stockpickr, we highlight lists of stocks that have been upgraded by analysts or are experiencing activist situations or some other market moving events. Rumors of the Day: In an amended regulatory filing, activist investor Carl Icahn disclosed he had upped his stake in software maker BEA Systems ( BEAS) to 11.05%, from 9.88%. Icahn earlier called for a sale of the company to a strategic buyer. Shares added 15 cents to $13.88. According to Bloomberg, Goldman Sachs ( GS) may buy subprime mortgage servicer Litton Loan Servicing. Litton's parent C-Bass hired Blackstone Group ( BX) in August to help raise capital. The stock gained $1.92 at $229.94. Today's Hot List: Panera Bread ( PNRA) upped its third-quarter outlook after reporting an uptick in revenue and comparable-store sales. The bakery-cafe now sees earnings of between 35 cents and 37 cents a share, vs. its previous guidance of 32 cents to 38 cents a share. The company reported a 35% increase in revenue in the third quarter, to $276 million. System-wide comparable bakery-cafe sales increased 0.8% for the four weeks ended Sept. 25. The stock jumped $3.11, or 7.2%, to $46.23. P.F Chang's China Bistro ( PFCB) disappointed investors by lowering its third-quarter guidance below Wall Street's expectations. The company anticipates third-quarter diluted earnings of between 5 cents and 7 cents a share below its previously released forecast of 25 cents a share. Analysts' consensus is 25 cents a share. The company reported consolidated revenues of $270.8 million for the third quarter, compared to $231 million in the year-ago period. P.F. Chang's shares sank 82 cents at $29.44. Analyst Downgrades: Citigroup downgraded video game retailer Gamestop ( GME) to hold from buy. The bank said the company will likely beat near-term earnings estimates, but the stock is already looking expensive based on 2008 numbers. Shares fell 98 cents at $56.62. Analyst Upgrades: Merrill Lynch upgraded telecom equipment maker Ciena ( CIEN) to buy. The firm lifted its target price to $52, saying the stock has already made a run, but margins continue to expand. Shares soared $2.26, or 5.3%, to $44.92.