Phoenix-based Advisor Group has more than 7,000 advisors nationwide. : (Bloomberg) -- Centerbridge Partners LP is in talks to buy independent broker-dealer Advisor Group Inc. for more than $2 billion, according to people familiar with the matter. The private equity firm could reach a deal as soon as this week to acquire Advisor Group, said the people, who asked to not be identified because the matter isn’t public. A deal hasn’t been finalized and talks could fall through, the people said.