Tighter supply, tougher rules rattle key U.S. funding market

By Richard Leong NEW YORK (Reuters) - Last month's spike in failed trades in Wall Street's key funding market sparked fears that it could be a sign of trouble brewing in the U.S. financial system, but the disruptions appear more likely to mark the "new normal" of the post-crisis era. Wall Street institutions, hedge funds and real estate investment trusts rely on the $5 trillion repurchase agreement market to finance their daily trades and any disruption is worrying because it could force them to