Tuesday's Tech Winners & Losers

Shares of Key Tronic(KTCC Quote) vaulted 41% after the electronics manufacturing services company boosted its fourth-quarter estimates. For the period ended June 30, the company now sees earnings of 18 cents to 20 cents a share, up from an earlier forecast of 7 cents to 12 cents a share. The company raised its revenue forecast to $52 million from an earlier view of $46 million to $50 million. Key Tronic attributed the better outlook to strong growth in demand from a number of existing customers and strong factory utilization and manufacturing efficiencies. Shares were trading at $5.94, up $1.74.

Other technology movers included JDSU(JDSU Quote), down 5 cents to $2.11; Microsoft(MSFT Quote), down 36 cents to $23.14; Cisco Systems(CSCO Quote), down 52 cents to $18.45; Intel(INTC Quote), down 3 cents to $18.15; Sun Microsystems(SUNW Quote), up 5 cents to $3.87; Sirius Satellite Radio(SIRI Quote), up 2 cents to $4.30; Oracle(ORCL Quote), down 17 cents to $14.42; Applied Materials(AMAT Quote), down 8 cents to $15.71; Apple Computer(AAPL Quote), up 8 cents to $55.08; and EMC(EMC Quote), up 5 cents to $10.46.