Stock market crash recession graph
  • A recession indicator with a flawless record has been flashing red for 20 months.
  • The economist behind the inverted yield curve says it's too soon to declare it's wrong this time.
  • Campbell Harvey, a Duke finance professor, pointed to signs of a cooling job market to back his concerns.

A recession indicator with a perfect track record has been flashing red for 20 months now, but the economist who pioneered its use warned against dismissing it just yet.

"I think it's way too early to declare a failure," Campbell Harvey told Fox Business about the inverted yield curve.