The SanDisk Corp. (SNDK), a technology company known for its flash memory disks, is up around 4 percent early this morning. For the third day in a row, Intuitive Surgical, Inc. (ISRG) is again posting increases to start the day with shares up more than 3 percent.

Companies down in early morning action are: eBay Inc. (EBAY), Agilent Technologies Inc. (A), Hewlett-Packard Co. (HPQ), and Chevron Corp. (CVX), which are all down more than 1 percent per share.

Shares of Intel Corp. (INTC) are the most exchanged this Monday morning with 15.38 million shares changing hands. Also, more than 11 million shares each of Sun Microsystems, Inc. (JAVA) and Apple Inc. (AAPL) have changed hands this morning.

Overall, the Dow Jones Industrial Average is trending down this morning, dipping below 13,500 points to start the week.

In stock news, the chief marketing office of Yahoo! Inc. (YHOO) is the latest the executive to leave, according to Reuters. The chief executive officer of Oracle Corp. (ORCL) has sold 1 million shares of the company, according to the Associated Press.