Subject: Re: Dec 31 BV?
"It looks from Warren's history of repurchases that his estimate of IV is about 1.56x BV. Berkshire repurchased shares in March at 1.56x BV and issued shares in Sept at 1.56x BV."

Another estimate of IV comes from the weighing machine method, where the trendline of a long term graph of price per share versus BV per share is used as the IV estimate. That IV estimate is now 1.53x BV. Today's stock price (Jan 15th) is 1.52x BV.