Possible Clues:

• Wall Street debut, for short
• WSJ news bit
• Snapchat had one in Mar. 2017
• Event that makes a CEO rich(er)
• Market event, briefly
• 2019 event for Pinterest, briefly
• Fodder for Forbes, initially
• Stock market debut, initially
• Yahoo! had one in 1996: Abbr
• CNBC news item