The 3 month-10 year portion of the yield curve has inverted.  Many consider this to be the tell tale sign for  an economic recession in 12 to 24 months.  However, some observers consider the 2 year U.S. treasury yield curve to be the better indicator.  Either way, here is a brief explanation from Reuters that offers a simple understanding of what a treasury yield curve inversion may mean.

Here is the article from the Reuters website.