Must be some kind of riddle

NYT ends this article on quantitative easing with a leading question, but seriously I don't know what they're so confused about.

A study published in February found that interest rates decreased, but only for companies with top credit ratings. “Rates that are highly relevant for households and many corporations — mortgage rates and rates on lower-grade corporate bonds — were largely unaffected by the policy,” wrote Arvind Krishnamurthy and Annette Vissing-Jorgensen, both finance professors at Northwestern University.

Another indication of its limited success: Borrowing has not grown significantly, suggesting that corporations — which are sitting on record piles of cash — are not yet seeing opportunities for new investments. Until they do, some economists argue that the Fed is pushing on a string.

“What has it done? It has eased credit conditions, it has pumped up the stock market, it has suppressed the dollar,” said Mickey Levy, Bank of America’s chief economist. “But does the Fed think that buying Treasuries and bloating its balance sheet is really going to create permanent job increases?”

Um... no. Of course they don't think that. Nor do they care all that much. The policy has propped up the stock market and asset prices and that's all it was intended to do.