I want to know the answer to the following question:
What is one investment assigned safe ratings by the credit rating agencies?
All the background I'm provided with is that "In a Peabody Award winning program, NPR correspondents argued that a "Giant Pool of Money" (represented by $70 trillion in worldwide fixed income investments) sought higher yields than those offered by U.S. Treasury bonds early in the decade.". Is that enough to answer the question?