"Shocked" Goldman Trader: "This Was The Largest 0DTE Block Trade I Have Ever Seen"

There was a lot of headscratching across Wall Street yesterday when exactly at 10:40am ET S&P futures swooned, with no fundamental news to catalyze the move. And then, 80 minutes later, the selling suddenly stopped and reversed as stocks staged a remarkable recovery with the S&P closing almost unchanged from its opening price.

A bizarre U-turn which left many asking what happened? We now have the answer, and yes - as many speculated, 0DTE was involved, only this time in (record) size.

As Goldman flows guru Scott Rubner writes this morning, there was a major development in 0DTEs, that he needed to flag ahead of his regular weekly commentary: