Banks are minting money from stock market whiplash. Goldman Sachs ( GS ) , JPMorgan Chase ( JPM ) , and Morgan Stanley ( MS ) pulled in more than $12 billion in equities trading revenue last quarter. That surpasses the peak of the post-pandemic trading boom, The Wall Street Journal ( NWSA ) reports. Advertisement “So far, the business is performing very well and clients are very active,” Goldman CEO David Solomon told analysts. That activity is being driven by investors scrambling to