When the Federal Reserve Open Market Committee meets Wednesday, no one expects it to raise the federal funds rate-the overnight bank rate that now hovers below 0.25 percent. However, businesses, politicians and prognosticators are eager, perhaps inappropriately so, to hear clues about when it will begin raising short-term interest rates to a more normal level.

Simply, Fed policy is much less relevant to U.S. growth and price stability than in the days of Paul Volcker, because China's yuan policy has substantially limited the importance of Fed interest rate decisions by severing the historic link between short interest rates-like the federal funds rate it targets-and long rates on mortgages, corporate bonds, and the securities banks use to finance lending on cars and credit cards.