BUZZ-Goldman Sachs Group Inc: Bond trading revenue slumps

** Shares of the Wall Street bank down 1.2 pct at $226.55 premarket

** Q2 bond trading revenue plummets 40 pct; worst qtr for segment since Q4 2015

** Echoes weak bond trading reported by JPMorgan, Bank of America, Citi

** But Goldman's Q2 EPS, revenue beat analysts' estimates

** Rival Morgan Stanley scheduled to report earnings on Wednesday

** Up to Monday's close, Goldman's stock had fallen 4.3 pct this year, significantly underperforming the 9.4 pct rise in Dow Jones Industrial Average index