Broadcom in advanced talks to buy Symantec for more than $15 billion

• What we're seeing: Symantec shares jumped in early trading, giving it a market cap of nearly $16 billion. No surprise there, as investors often expect a premium to the leaked premium. Broadcom shares are down more than 3%, perhaps over fears that this could be like the last time a chipmaker paid big for a cybersecurity company (i.e., Intel buying McAfee, and then later selling it at a major discount to TPG).

The bottom line: Broadcom is using M&A to move deeper into software than into its core competency of chips, after last year being blocked by regulators from buying Qualcomm but permitted to buy CA Technologies.

Go deeper: Computer chips are still "Made in USA"