An investment, on the other hand, is a long-term trading thesis that is not event driven. Cramer said investments are not an excuse to buy and forget, however, they can still go wrong. That's why he recommends one hour of homework a week for each stock in your portfolio. As long as your investment thesis is still intact, he said, investors can continue to own their investments. "Never turn a trade into an investment," Cramer reminded viewers, even if that trade is a successful one.
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