Amazon (AMZN) has pulled back nearly 10% after hitting an all-time high last week, but dip buyers should remember that RadioShack once seemed like a bargain, too -- until its stock fell to zero, TheStreet's David Yoe Williams says. "At a certain point when RadioShack was starting to fade, it [looked like] a buy at $15, $10, $5, a dollar-and-a-half -- [except] it wasn't," Williams said during TheStreet's August Trading Strategies roundtable discussion. "Everybody said Amazon was so great and [is] going to kill [traditional] retail, but come to find out maybe it hasn't," he said. "It's really only 20 percent of the market." Government Crackdown of Amazon Is Coming, Netflix Board Member Says Williams

Could Toyota Motor Corp. (TM) emerge from the latest U.S. sales downturn as the No. 1 seller of new vehicles, displacing General Motors Co. (GM) , the historic No. 1 in its home market? Sales figures from July could be a preview of things to come as the Japanese automaker slowly and steadily gains ground in the U.S. on GM and Ford Motor Co. (F) . Toyota has done particularly well in the U.S. during industry downturns, gaining share when less financially sound rivals are forced to cut spending on advertising and to pare back lower-profit sales to rental fleets. Toyota finished slightly behind Volkswagen AG (VLKAY) as global No. 1 in 2016 and both are slightly ahead of the alliance of Renault SA and Nissan Motor Corp. (NSANY) on a global basis, which now include vehicles built by Mitsubishi Motors Corp., in which Nissan holds a controlling 34% stake.

Apple (AAPL) CEO Tim Cook on Tuesday had a lot to say about the company's solid second-quarter earnings, but he didn't quite know how to respond when he was asked about President Donald Trump's comments last week. Cook and other Apple executives held a call with investors late Tuesday to go over the second-quarter earnings report. UBS analyst Steven Milunovich asked about Trump's remark that Cook had personally promised to build "three big, beautiful plants" in the U.S. Trump told the Wall Street Journal that he wouldn't consider his administration an "economic success" unless Cook committed to construct facilities on U.S. shores. Milunovich asked Cook whether the factories might be a possibility