Well, Gentle Ben has spoken up:
But what matters most for the economy is the real, or inflation-adjusted, interest rate (the market, or nominal, interest rate minus the inflation rate). The real interest rate is most relevant for capital investment decisions, for example. The Fed's ability to affect real rates of return, especially longer-term real rates, is transitory and limited.
The bottom line is that the state of the economy, not the Fed, ultimately determines the real rate of return attainable by savers and investors.
He closes with
The state of the economy, not the Fed, is the ultimate determinant of the sustainable level of real returns. This helps explain why real interest rates are low throughout the industrialized world, not just in the United States. What features of the economic landscape are the ultimate sources of today's low real rates? I'll tackle that in later posts.
It may be time to send him a bill for my consulting services.