Although it's not a perfect indicator, when a company insider -- either a board member or a C-suite executive -- purchases a lot of stock on the open market, it can be an encouraging sign for a stock.

And it's not every day when you see a massive insider purchase of a stock that has already tripled over just a few months.

Yet that's exactly what happened on Friday with artificial-intelligence (AI) server specialist Super Micro Computer (NASDAQ: SMCI), which is certainly encouraging for shareholders following the stock's post-earnings pullback.

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Source Fool.com