Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and Nasdaq Stock Market:
E.I. du Pont de Nemours and Co., down $1.48 at $45.04
The chemical maker cut its 2011 profit guidance due to weak demand for electronics, industrial supplies and other items.
The Cooper Cos. Inc., up $9.65 at $67.81
The eye care company said its profit increased 18 percent in the fiscal fourth quarter as sales of its contact lenses improved.
Pall Corp., up $4.16 at $56.66
The filtration equipment maker reported better-than-expected adjusted earnings and a 16.5 percent jump in quarterly revenue.
General Electric Co., up 53 cents at $16.84
The industrial and electrical giant raised its quarterly dividend by 2 cents to 17 cents per share, its fourth rise in two years.
Texas Instruments Inc., up 2 cents at $29.94
The semiconductor maker lowered its fourth-quarter revenue and profit outlook citing weaker demand for products that use its chips.
Diamond Foods Inc., up $14.01 at $40.56
A KeyBanc analyst said the snack maker's accounting probe will end quickly and that its Pringles acquisition will go through.
Blue Coat Systems Inc., up $7.63 at $25.11
The provider of Internet networking and security products agreed to be acquired by a private equity firm in a $1.3 billion deal.
Smith & Wesson Holding Corp., up 50 cents at $3.83
The gunmaker reported a smaller second-quarter loss because of improvements in its security division, which it is trying to sell.