Gosh, the world is so inundated in a savings glut, averred Wall Street economist Ed McKeon, that the interest rate would be near zero—–even without the concerted action of the central banks.

Hogwash! Since the turn of the century the major central banks have purchased upwards of $15 trillion worth of government bonds and other fixed income assets. Yes, these reckless money printers have suspended common sense, but they have not repealed the law of supply and demand, nor even suspended its relentless operation for a nanosecond.

So in adding massively to "demand" for something that sells at a price (the interest rate), the big fat bid of the central banks has caused fixed income markets to clear at much higher prices (lower yields) than would otherwise be the case. That's just economics 101.