Shares of C3.ai (NYSE: AI) were jumping again Friday even though there was no company-specific news regarding the artificial intelligence-focused software-as-a-service business.

Instead, the reason for its gains seems to be a phenomenon known as "window dressing" -- the practice of funds buying top-performing stocks just before a quarter ends so they can show them on their books and tell investors that they own them.

As of 3:31 p.m. ET, the stock was up 19.9%.

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Source Fool.com