CNBC's Jim Cramer offered advice on how to deal with declines, using Tuesday's down session as an example. He encouraged investors to use widespread losses as a buying opportunity, pointing out that the indexes managed to rebound on Wednesday.

"If you trust the market, if you don't believe that one stock controls the entire tape, if you don't take counsel of your fears and you do take counsel of your opportunities," he said. "A day like yesterday can be the way you finally get a chance to start wading in — not all at once, that's for fools, but gradually."

The major indexes fell on Tuesday, led largely by an 8% decline in Palantir and artificial intelligence stocks as investors worried about many of these tech companies' bloated valuations. Palantir's losses came just aft

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