It's one of the reasons Buffett has never sold a share of American Express (AXP 0.44%), a stock he's held for 35 years. Thirty-five years into Buffett's investment, American Express is still growing at above-average rates. Meanwhile, American Express just raised the annual fee on its Platinum Card by a whopping $200 to $895, while also adding $1,400 of new benefits. Chubb LimitedLike American Express, Chubb Limited (CB 0.90%) caters to high-end clients in the homeowner's and business property and casualty insurance market. With the stock trading at just 12.3 times earnings, now is a solid entry point to buy and hold Chubb for the long haul.