Here’s a picture from a New England Journal of Medicine article showing that in 2015 and 2016, Obamacare premiums grew more slowly than private insurance premiums rose before the law came into effect:
The Obamacare markets are new and unsettled. But so far they aren’t leading to runaway inflation. But what will happen to these markets if the Republicans are able to repeal and delay? Cue the ominous movie music!