With Barclays boss C.S. “Venkat” Venkatakrishnan less than a year into his plan to revive the U.K. bank and its stock price, the signs are promising. London-listed shares jumped Thursday, on course for their highest close since 2015, after Barclays reported forecast-beating quarterly earnings. The investment bank was a bright spot. As at bigger Wall Street rivals, income from stock trading and advisory fees rose, boosted by volatile markets and a dealmaking revival.