Actually Sushi1, The significant factor he does not include is...

Actually Sushi1,

The significant factor he does not include is the impact of inflation on rates of return. If inflation is 10% and your interest rate is 11%, your real rate of return is only 1%. If Sir Alan can keep inflation below 2% without causing widespread deflation, he will have served the Yanks well.
The bit thats perplexing most analysts is that in the drive to kill inflation they didn't factor in potential damage from deflation.

Cheers