Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and Nasdaq Stock Market:
Ford Motor Co., up 56 cents at $12.26
Standard & Poor's lifed the automaker's credit rating to near investment grade, making it cheaper for the company to borrow.
Seagate Technology PLC, up $3.36 at $15.42
Analysts said the hard disk drive maker could increase market share because flooding in Thailand has shut down a rival's factories.
Chipotle Mexican Grill Inc., up $25.58 at $333.49
More people went to the burrito chain's restaurants. Higher prices and new locations helped lift third-quarter profit 25 percent.
Oshkosh Corp., up $1.50 at $19.90
A Bloomberg report speculated that activist investor Carl Icahn wants to combine the truck maker with rival Navistar.
SunTrust Banks Inc., down 64 cents at $18.57
The regional bank's earnings rose as credit trends improved. But a drop in revenue related to mortgages caused shares to drop.
Southwest Airlines Co., down 23 cents at $8.87
The airline's third quarter loss was its first in two years. Fuel-hedging bets turned sour when oil prices fell this summer.
Acme Packet Inc., down $7.76 at $30.37
Revenue increased, but costs also rose for sales, marketing and other items. Third-quarter profit fell nearly 25 percent.
Biogen Idec Inc., up $7.17 at $108.84
The drugmaker said a potential drug for multiple sclerosis met its treatment and safety goals in a late-stage clinical trial.