Also

* General Electric Co.’s union workers are planning their first national strike in more than 30 years as the company prepares to raise health-care co-payments Jan. 1.

* Oracle Corp. Chief Executive Larry Ellison exercised 2.875 million stock options to buy common shares of the world’s third-biggest software maker, for about 10% of the current share price. Ellison purchased the shares Friday for an average price of $1.04.

* Aviation General Inc.’s Commander Aircraft unit, which makes single-engine planes that can fly at a speed of 215 mph at 25,000 feet, sought bankruptcy protection after a sales slowdown and may be sold.