More U.S. billionaires pledge to give away wealth

And the pledge is just keep coming. Since I wrote 40 billionaires pledge to give away half of wealth , another 17 U.S. billionaires, including Facebook co-founders Mark Zuckerberg and Dustin Moskovitz, have pledged to give away at least half their fortunes in a philanthropic campaign led by Warren Buffett and Bill Gates.

A total of 57 billionaires now have joined The Giving Pledge, which was launched by Microsoft founder Gates and investor Buffett in June. The campaign announced the new pledges in a statement late on Wednesday.

Gates, his wife Melinda, and Buffett have asked U.S. billionaires to give away at least half their wealth during their lifetime or after their death, and to publicly state their intention with a letter explaining their decision.

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