Don't Sweat the Inverted Yield Curve: No One Really Knows What It Means - Knowledge@Wharton

Yield curves (the graph of yield on a class of bonds to their time to matuiry) are usually upwards sloping. That is, you generally get a higher rate the longer you go out in time.However, that is not always the case. Indeed, if you watch the living yield curve, you see that occasionally the yield curve is flat, and at other times (such as now) it is inverted with longer term rates being lower