The Yield Curve Accordion Theory
The yield curve (a plot of interest rates versus the maturities of securities of equal credit quality) is a handy economic and investment tool. It generally slopes upward because investors expect higher returns when their money is tied up for long periods. When the economy is growing robustly, it tends to steepen as more firms break ground on long-term investment projects. For example, firms may decide to build new factories when the economy is rosy. Since these projects take years to complete, firms issue long-term bonds to finance the construction.