The Japanese company Mizuho Securities wanted to sell one share for ¥610,000 (about $5,000) on the Tokyo Stock Exchange. Yet it seems a stockbroker hadn’t had enough sleep and made a little mistake when entering the data. He put up for sale 610,000 shares for only ¥1 each. Despite the company’s protest, the Stock Exchange processed the order, which resulted in the loss of $225M.