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Most people might just as well buy a share of the whole market, which pools all the information, than delude themselves into thinking they know something the market doesn't.

In college, I was told the market can't be beat.

I've been investing in the stock market for 27 years and, within that time, have helped investors beat the market nearly four to one.

While it's wonderful that investors have access to all the data now available to them, it has become a full-time job to sift through it and separate out the valuable news from the useless noise.

Look: invest in what you understand, what's foreseeably going to offer real value and returns, not necessarily what's trendy.

I never attempt to make money on the stock market. I buy on the assumption that they could close the market the next day and not reopen it for five years.

Investors should invest on what they know. The biggest mistake is to invest on what they don't know.

Markets work best when there's lots of information available and a historical track record to go on; they excel at predicting things like horse races, election outcomes, and box-office results. But they're bad at predicting things like who will be the next Supreme Court nominee, as that depends on the whim of the president.

The amount of data and analysis available for free is a true example of information explosion has leveled the playing field for individual investors.

I will never be in the stock market. It's just gambling. I'm a gambler, but I'll gamble on the practicality of things.