Subject: Re: Book Value & Repurchase History
The repurchase algorithm is likely more than just "anything below xBook", it likely looks like this.

1) Is there excess cash? --> Yes
2) Are there any attractive investments --> No
3) Is BRK cheap --> Not yet


So if you want to create a table, I would also include the SP500 trailing PE as a proxy for "any attractive investments".

tecmo
...