Core Viewpoint - Goldman Sachs indicates that the "Goldilocks" summer market is coming to an end, with signs of slowing economic growth in the U.S. leading to increased market volatility [1] Group 1: Market Performance - Christian Mueller-Glissmann, head of asset allocation research, notes that September typically shows weak performance, and this year's post-summer market may be particularly challenging [1] - There is uncertainty about whether the previous growth momentum can be maintained [1] Group 2: Volatility Expectations - Mueller-Glissmann expects the Volatility Index (VIX) to rise, as it has fallen to its lowest level since December of the previous year [1]