WASHINGTON -- Federal Reserve Board chairman Alan Greenspan yesterday left the door open for another round of credit-tightening but did not make it clear when Fed officials may act.

Testifying before the Senate Banking Committee, Greenspan said, "The economy is doing well, there's no question about it, it's solid." He added that although the economy is slowing from the "fairly exuberant" pace of growth recorded late last year and early this year, "it's still unclear" how much slackening is taking place.

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