Subject: Re: BRK's 12/31/2022 P/B Ratio
"Has anyone attempted to derive a "back of the envelope" update for BRK's year-end price-to-book ratio?" I estimate that P/B as of year end was about 1.51, as follows:

I estimate that the equity portfolio lost about 2.7% in Q4. After adjusting for deferred taxes the equity portfolio makes up about 51% of BV.
I estimate that the rest of Berkshire increased in BV by about 2.5% in Q4.
I estimate that the share count declined by about 0.1% in Q4.
The stock price increased by 15.3% in Q4.

We'll know the exact numbers soon.

I see Berkshire as being fairly valued and increasing in IV at about 10%/year.