Boston University economist Juliet Schor says people are increasingly coming together for these kinds of informal swaps.

VOA: special.2010.11.22

(JOSH BIRNBAUM) "Our desk began to accumulate short positions, purchasing protection on individual securities through credit default swaps, largely from external C.D.O.managers who asked us to bid for these positions."

VOA: special.2010.04.30

While many Israelis support bringing Gilad Shalit home at any price, others believe that lopsided prisoner swaps will bring more terrorism and more terrorist blackmail.

VOA: standard.2009.03.15

But no matter where the conflict is or what it's about, if you're serious about peace, you can't take as final the first 'no,' the second 'no' or even the hundredth 'no.'" In her statement, Secretary Clinton promised an "unwavering" U.S.commitment to a two-state solution, based on 1967 lines with agreed land swaps, that will create an independent and viable Palestinian state and an Israel with secure and recognized borders.

VOA: standard.2009.11.25