Stifel is now negotiating key aspects with Barclays, although a deal is not certain and Barclays could go back to other bidders that have made offers, the people said this week. The sources requested anonymity because the matter is not public, and a spokeswoman for Stifel and a spokesman for Barclays declined to comment. Barclays has been reaching out to potential acquirers for the business for several weeks because it views it as non-core, sources told Reuters.