Investors looking for clues on who will drive off with NYSE Euronext can learn from last year's dustup over Dollar Thrifty Automotive. Read more

and launched a higher bid, ginning up anger among Dollar Thrifty shareholders. Five months later, they vetoed the Hertz deal. Despite the very different industries, there are parallels with NYSE. Like Avis, the tandem of and IntercontinentalExchange is...