Key exchange insurers, including Centene, United, CVS Health and Cigna, are a well-positioned to glean new consumers due to Bright Health Group’s recent decision to drop out of the exchange market, which has left about a million consumers having to find new coverage, a health care analyst says in a recent memo. “Bright Health's plans to exit the ACA marketplace by year-end leaves roughly $4 billion in ACA revenue up for grabs on the eve of open-enrollment season, with Centene,...