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.
If you think bonds are a "safe" alternative to stocks, think again. History shows that bonds can go through wild swings like stocks. Look at these two charts.