Answer:
Step-by-step explanation:
Wall Street experienced one of the largest single-day crashes in 1987 with a $500 billion loss as markets plummeted worldwide. The computers of Wall Street were programmed to sell stock at specific price thresholds. A domino effect of computers liquidating thousands of stocks ensued, with clerks unable to stop the transactions. The automated program also prevented buying, which wiped away any bids. After this, special rules were implemented to allow automated protocols to be overridden and prevent future disasters.