To be clear, none of these people actually serve in the government yet, since almost all of them will require Senate confirmation. And that's not a slam dunk: There's already been plenty of public discussion from current senators about whether Exxon Mobil CEO Tillerson is an appropriate choice to be secretary of State, especially because of his connections to Russian President Vladimir Putin.

But for now the index is worth following.

We'll be updating the index as time goes on depending on who is in and out of the government, and which companies they have direct relationships with. It will be interesting to watch whether these companies get an added benefit for having one of their own in government, or whether they sell off harder than normal when the difficulties of managing the nation become a daily reality.

Some notes about the index: We did not include WWE because Linda McMahon is no longer on its board of directors, having left to run for senate several years ago. But we did include Goldman Sachs, because Cohn is on that board. Even though Cohn's future nomination as director of the National Economic Council doesn't require Senate confirmation since it's not a Cabinet position, we thought it was a relevant and powerful enough job to include in the basket. We also included Steve Mnuchin's connection to Sears, which he gave up in early December specifically to join the incoming team.