Phillips 66 purchase a "great transaction" for Berkshire, but what about PSX?

|About: Berkshire Hathaway Inc (BRK.A)|By:, SA News Editor

For Berkshire Hathaway (BRK.A, BRK.B), the purchase of Phillips 66's (PSX +2.9%) specialty products unit has a lot to do with the tax treatment; the financial terms of the deal look like the cash-rich spinoffs used by Liberty Media when it acquired interests in businesses such as the Atlanta Braves and DirecTV.

The cash-rich split is a way for a holder of appreciated stock - PSX has gained 45% YTD - to dispose of it in a very tax efficient way, tax expert Robert Willens says, calling the acquisition a "great transaction" for Berkshire.

But Barron's Ben Levisohn wonders what the purchase might say about PSX: BRK chose to pay with ~19M PSX shares it already owns and not with cash - is it a sign Warren Buffett thinks PSX has run too far?