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Last week, when discussing thebizarre summer doldrumsin the market which pushed the VIX to the lowest level since the onset of the covid pandemic, we said that this period of abnormal market quiet is likely to last until this Friday' quad-witch, when a massive amount of gamma and delta expire and are de-risked, in the process eliminating one of the natural downside stock buffers .So picking up on the topic of Friday' potentially market-moving opex, Goldman' in-house derivatives expert, Rocky Fis