Chubb Reports Second Quarter Net Income Per Share of $4.32, Up 54.3%, and Record Core Operating Income Per Share of $4.92, Up 16.6%; Consolidated Net Premiums Written of $11.95 Billion, Up 16.1%, or 16.8% in Constant Dollars, with P&C Up 10.4% and Combined Ratio of 85.4%; Year-to-Date Net Income Per Share of $8.84, Up 20.3%, and Record Core Operating Income Per Share of $9.32, Up 15.8%