(Bloomberg) -- Wirecard AG, one of Europe’s largest fintech firms as recently as two weeks ago, collapsed in an accounting scandal that has pushed the company to file for insolvency. So why is it the best-performing stock in Germany’s benchmark DAX Index this week?On Friday the stock was down 99% for the year. In the two trading sessions since Friday’s low, shares in the scandal-ridden payments provider have risen more than four-fold, with more than 36 million shares changing hands in each session, more than 10 times the average for the past year. It’s an echo of the bizarre trading this month in shares of U.S. rental-car company Hertz Global Holdings Inc.: An equity that’s almost sure to be worthless captures the imagination of individual investors, despite the warnings of professionals.The bounce in the battered stock is being driven by speculators rather “than any fundamentals whatsoever,” Berlin-based insolvency specialist Volker Beissenhirtz...
