On Wednesday, Berkshire Hathaway Inc. ( BRK.A , Financial)( BRK.B , Financial) CEO Warren Buffett (Trades, Portfolio)'s favorite market indicator stood at 133.9%, down from the Feb. 2 level of 139.5%. Additionally, the insurance conglomerate's top holdings are less overvalued based on GuruFocus' exclusive valuation method, the GF Value.