Once dismissed as a fringe theory, the idea that corporate thirst for profits drives up inflation, aka "greedflation," is now being taken more seriously by economists, policymakers and the business press.

Why it matters: Though inflation is starting to come down, it still remains well above the Fed's target level of 2%, and understanding what's causing inflation is key to combatting it — now and the next time.

The idea that profits drove our current bout of inflation surfaced in the last few years among progressive economists and lawmakers but was waved away by more mainstream types as a "conspiracy theory." That changed earlier this year.