This family of tracking stocks for various parts of the Liberty Media empire calls for a pretty good mental map of who’s doing what, where, when, and how well. What with buying into SiriusXM and writing down a billion three at Starz Entertainment, there is lots going on.

One of the great things about focusing on the spin-off is that in spite of all the talk, the pre-spinoff moves, and whatever other headfakes come along, we are going to have it all in writing when the SEC documents are filed.

Given how this whole group of companies is set up, it is likely to be a challenging read.

When it comes to spin-offs, the challenging reads have been described as the ones that just might be a treasure hunt with the map designed to throw off the less committed.

At least, the weather ought to be warmer by the time the paperwork is ready for us to pore over. Just the stuff for sitting under a tree by the lake with red underlining pencil in hand.