Subject: Re: WHY is brkb so strong ?
berkshire has always traded more in line with XLF than Apple.

Indeed.
Even though it makes some sense that a share of Berkshire be deemed worth more when a share of Apple is worth more, the reverse seems to be true more often than not.
The *style* of investor in Berkshire is different from the style in Apple, so swings of style seem to have more effect than logical assessments of value.

Jim