Next year’s premiums for health coverage under the Affordable Care Act could rise more than in past years in most markets and declines might be rare, according to a preliminary analysis of insurers’ plans.

Overall, premiums for a popular type of plan — the second-lowest silver plan — could rise 10 percent on average next year in 14 major metropolitan areas, according to an analysis released Wednesday by the Kaiser Family Foundation. Kaiser based its projections on insurers’ preliminary rates filed with state regulators, which remain subject to state or federal review. (KHN is an editorially independent program of the foundation.)

Last year, premiums for the second-lowest silver plan in those metro areas rose 5 percent after state insurance departments signed off, Kaiser said.

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