Mississippi: *Preliminary* avg. 2020 #ACA premiums: 2.7% increase
Not much to say about Mississippi this year...they still have two carriers on the individual market, and while they do have a whole website/database set up specifically to track and report health insurance premium changes, it's messy and only appears to post the rate filings after they've been approved, which won't be for another couple of months.
As a result, I have no idea what the relative market share is between the two and am assuming they're roughly even. Even if they aren't, the requested rate changes are so close it doesn't make much difference anyway (2.3% and 3.0%). If approved as is, unsubsidized Mississippians can expect to pay about $200 more total next year.
On the small group market, there's five carriers; again, I don't know the market share of any of them, so the unweighted average increase is 6.2% statewide.