Treasury yields don't show it, but most analysts agree the Federal Reserve's Operation Twist program has been a boon for investors during the year's final quarter. The program, which has its final sale of short-dated debt for the year on Wednesday, pushed up a volatile U.S. stock market over the past few months and helped lower mortgage rates, breathing some life into the otherwise struggling U.S. housing sector, they said. Last week, Freddie Mac showed a variety of loan rates notching or matching record lows; the 30-year fixed rate fell to 3.91%, a record low.
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