The trading floor of the New York Stock Exchange prepares for the social media platform Reddit's initial public offering in New York City on March 21, 2024.Spencer Platt | Getty ImagesReddit shares are plummeting after experiencing a rally stemming from the social media company's IPO last week.Shares closed at $49.32, ending the week below their closing price on Reddit's first day of trading on the New York Stock Exchange. They closed at $50.44 last Thursday. Stock markets are closed on Good Fri...