Many Wall Street banks are expected to report underwhelming second-quarter results next week, after light bond market activity in the spring worsened into a downturn by June, analysts said. Investor worries spanned the globe last quarter, ranging from fiscal woes in Greece to crashing stock markets in China, to concerns that the U.S. Federal Reserve will not be able to raise interest rates later this year. As the concerns worsened with less certain outcomes, investors pulled back from markets to avoid getting burned, analysts said.