Dealer revenue from negotiating interest-rate swap transactions is poised to plunge about 45 percent as new rules boost trading costs, pressures that may prompt banks to participate less in the $633 trillion over-the-counter derivatives market, Tabb Group LLC estimates . . .

http://www.bloomberg.com/news/2013-12-09/banks-poised-to-reduce-rate-swap-trading-as-revenue-seen-reduced.html