Cramer's 'Man Vs. Machine' Trade

It's man versus machine on Wall Street, Cramer said during Tuesday's Stop Trading!, and if you think the machines will win, then buy Knight Capital.

After the "flash crash" of May 6, where the Dow plummeted nearly 1,000 points in a matter of minutes, there has been a call for increased regulation on machine-driven high-frequency trading. While Cramer counts himself among these critics, he doubts whether any new rules will be instituted. Still, the talk alone has hurt Knight's share price, enough for him to think the stock could bounce back if the Securities and Excxhange Commission fails to act. And that's why he recommended KCG on Tuesday.

"The stock's close to its 52-week low because of a belief that the SEC's going to take action," Cramer said. "If you think like I do that it's all lip service and the SEC's going to let things go, then you probably want to get interested in Knight."

Cramer remains bullish on gold, saying he thinks the price per ounce will eventually reach $2,000. There are still a few gold stocks that aren't yet at their 52-week highs, he said, so "buy them."

In oil, Cramer wondered how many analysts have to downgrade Exxon Mobil before they realize the stock has bottomed, because the share price refuses to sink lower regardless. He didn't endorse buying XOM, but he did note that it appears the floor for this stock has been found.

"This stock refuses to go down on downgrades," Cramer said. "What does that tell you?"

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