As the stock market continues to hit record highs, one metric is reaching dangerous levels, leaving some analysts worried.

In the following video, Fool markets analyst Mike Klesta talks with Fool contributor Dan Caplinger about one signal that shows investors may be getting ahead of themselves with the current bull market.

Neither Fool contributor Dan Caplinger, Mike Klesta, nor The Motley Fool has a position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.