Happy April Fools' Day! It's a day of fun and mischief, as people try to separate nonsense from reality.

The market has pleased many investors recently, steadily building momentum over the past several months. That's produced some great returns for shareholders of companies like Nvidia (NASDAQ: NVDA), Netflix (NASDAQ: NFLX), and C3.ai (NYSE: AI), which are up significantly in recent months.

But are these rallies real? Or is Wall Street playing a trick on investors' hearts? Three Motley Fool contributors aren't buying the rallies on these three names. Here's why.

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Source Fool.com