Pinduoduo's (NASDAQ: PDD) stock price plunged 14% on March 20 after it posted its fourth-quarter earnings report. For the full year, Pinduoduo's revenue grew 39% to 130.56 billion yuan ($18.93 billion) -- decelerating from its 58% growth in 2021 -- but its adjusted earnings per ADS nearly tripled to 27.45 yuan ($3.98) per share. Let's see why Pinduoduo's stock tumbled -- and why I believe it's still a great growth stock for investors who can tune out the near-term noise.