After MF Global, traders hold tight to excess collateral (Reuters)

[unable to retrieve full-text content]Reuters - Until last October, farmers and fund managers rarely lost sleep over the extra money that they habitually maintained in their brokerage accounts, confident that it would be there the next morning.

Source: http://us.rd.yahoo.com/dailynews/rss/business/*http%3A//news.yahoo.com/s/nm/20120217/bs_nm/us_mfglobal_collateral

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