Reuters: Verizon is said to be working on its bid for Yahoo’s core assets with an investment bank which was, as recently as last year, one of the U.S. internet company’s top advisers. Verizon has added former Yahoo adviser Bank of America to its roster of investment banks, as the U.S. telecommunications carrier seeks an edge over other bidders ahead of a June 6 second-round bid deadline in the auction for the core assets, sources said.