WASHINGTON, June 26 - Federal Reserve officials, who meet this week, are beginning to suspect that the perplexing decline in long-term interest rates is more than a temporary aberration. The possibility has major implications for the economy, and it creates new puzzles for Fed officials on how they should respond. On Thursday, the Fed is all but certain to raise the federal funds rate on overnight loans between banks by another quarter point, to 3.25 percent. That would be the ninth increase in the last year, and the central bank is expected to signal that it will continue to raise...
