The past few days have been very eventful for Discover Financial Services (DFS 4.99%). The company, best known as the entity behind the underdog Discover credit card, is now approved to be acquired by a peer. It also reported encouraging quarterly financials.With these strong winds at its back, according to data compiled by S&P Global Market Intelligence, Discover stock was up by more than 13% week to date as of very early Friday morning.A busy couple of days for DiscoverDiscover charged into the week on a ...