Goldman Sachs Group Inc. said the U.S. economy is likely to be “fairly bad” or “very bad” over the next six to nine months. “We see two main scenarios,” analysts led by Jan Hatzius, the New York-based chief U.S. economist at the company, wrote in an e-mail to clients. “A fairly bad one in which the economy grows at a 1 1/2 percent to 2 percent rate through the middle of next year and the unemployment rate rises moderately to 10 percent, and a very bad one in which the economy returns to an outright recession.” The Federal Reserve will probably move to spur growth as soon as its next meeting on Nov. 2-3, Hatzius said. Expectations for central bank action have already led to lower interest rates, higher stock prices and a weaker dollar, according to Goldman, one of the 18 primary dealers that are required to bid at government debt sales.