"BLOOMINGTON, Ill., Feb. 27 /PRNewswire/ -- Net worth for the State Farm group decreased in 2008 by $10.4 billion to end the year at $53.3 billion. The primary reason for the decrease was the $9.2 billion decline in the value of the property-casualty (P-C) companies' unaffiliated stock portfolio (net of deferred tax). Although this decline was driven by general market conditions, State Farm's P-C portfolio had a smaller percentage decline than the broader equity market."