The stock market crash of 2018 might go down in history in several respects. While the momentary flash crash of May 2010 was algorithmically driven – a discernable pattern was detected that “spooked” the computer-based market making system – the market recovered quickly as the longer-term trend momentum signals ignored the hick-up. But the winter 2018 crash had both fundamental similarities and differences – but the action might not be over, says a Bank of America Merrill Lynch report.