Bonds are boring. They are the beige minivan of the investment world. Yet, bond yields (which move inversely to prices) are hugely important. They determine lots of things: from how much companies and governments pay to borrow money -- to the rate you get on your mortgage. To help you navigate the complex world of interest rates, here are some free resources.
"Credit rating agencies and the subprime crisis" was such a hot topic 10 years ago, after the stock market crash, that it now has its own Wikipedia page. Many mistakes have been corrected since then. But one flaw remains.