CNBC's Jim Cramer said investors shouldn't obsess over news that's already widespread across Wall Street, but instead pinpoint trends not yet accepted in the broader market zeitgeist.
"If you want to be a better investor, don't tear your hair out fretting about the same things as everybody else," he said.
"Instead, you should worry about the things other people don't seem to care about, because the real threat is the one that you don't see coming."
It's often irrational and can make mistakes and ignore important pieces of information, Cramer said.
However, the efficient market hypothesis provides a rough, but helpful, guideline for investing, he said.
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