NEW YORK (AP) -- Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and the Nasdaq Stock Market:
Darden Restaurants Inc., down $3.52 to $45.78
The owner of Olive Garden and Red Lobster reported a sharply lower quarterly profit and announced the retirement of its president.
AK Steel Holding Corp., down 35 cents to $4.09
The steelmaker forecast a larger-than-expected loss for the third quarter, citing lower pricing and falling shipments.
Rite Aid Corp., up 9 cents to $4.67
Generic drugs, strong expense control and improved profitability prompts Credit Suisse to boost its price target on the drugstore chain's stock.
Arch Coal Inc., down 25 cents to $4.74
A proposal from the Obama administration that would limit carbon pollution from new power plants weighs on shares of coal companies.
Apple Inc., down $4.89 to $467.41
The company starts selling the iPhone 5S and 5C in the U.S. and several other markets.
Prosensa Holding N.V., down $16.86 to $7.14
A treatment developed by the Dutch biotech company for Duchenne muscular dystrophy failed in a late-stage study.
Taser International Inc., up 54 cents to $14.79
The security equipment company's stock is repeatedly hitting multiyear highs as more police departments make its wearable cameras standard gear.
Rocket Fuel, up $27.10 to $56.10
Shares of the artificial intelligence company rocket higher in their first day as a publicly traded company.