Disappointing preliminary quarterly results pushedNvidia(NVDA) stock lower earlier this month. However, shares in the chip maker have since made up their recent losses. While facing challenges, as the company's long-term prospects remain solid, the market wasn't wrong in "buying the dip." So far in August,Nvidia(NASDAQ:NVDA) stock has been making some whipsaw moves. Following its announcement of preliminary results for the preceding quarter, investors bailed out of the chip maker’s shares, sending the stock lower by double-digits over two trading days.But not too long after that, the stock bounced back to levels seen just before the preliminary earnings news. At first glance, you may think this is an odd move for shares to make. After all, the latest results suggest more challenges lie ahe