U.S. officials on bank "stress test" tightrope Thu Apr 23, 2009 6:01pm EDT By Mark Felsenthal and David Lawder - Analysis WASHINGTON (Reuters) - U.S. officials testing the health of the nation's top banks must walk a tightrope when they disclose the exams' results: The scrutiny must be tough enough to be credible, but not so harsh as to rattle an already shaken system. "The challenging thing here is presumably they're going to be talking about some information that is not going to be at all flattering for some institutions," said Kevin Petrasic, a banking lawyer at Paul, Hastings, Janofsky...