NEW YORK (AP) _ Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange, Nasdaq Stock Market, and American Stock Exchange.

NYSE

Exxon, up 1 11/16 at 74 3/8

Mobil, up 7 5/8 at 86

The companies confirmed that they are discussing a merger that would create the world's largest oil company, but said no deal has been reached yet. Reports had surfaced earlier this week that Exxon was negotiating to buy Mobil, which has a current market value of about $61 billion.

Boeing, down 1 3/8 at 41 3/8

European Union regulators are investigating pricing practices by airplane manufacturers Boeing and Airbus Industrie.

NASDAQ

Books-A-Million, up 26 at 38 15/16

The stock has surged from $3 in a week amid news that the Birmingham, Ala.-based book retailer has unveiled an enhanced Website. The company operates 172 stores in 17 states.

Full House, down 5/16 at 3

The Las Vegas-based casino developer received an exclusive license to develop a Hard Rock Hotel & Casino and Hard Rock Live concert venue on the Mississippi Gulf Coast.

Big Entertainment, up 5 5/16 at 13

The online retailer of media-related merchandise launched its Website, bige.com. Big Entertainment, which is affiliated with usatoday.com, also plans to offer live Internet broadcasts of wrestling events and sell related merchandise.