Reddit CEO Steve Huffman stands on the floor of the New York Stock Exchange (NYSE) after ringing a bell on the floor setting the share price at $47 in its initial public offering (IPO) on March 21, 2024 in New York City.Spencer Platt | Getty ImagesReddit shares jumped 22% in extended trading Tuesday, topping $100 for the first time, after the social media company reported third-quarter results that topped analyst estimates and issued an optimistic forecast for the current period.Here's how the c...